Turn off the alarm light. Why is the alarm light always on?

Alarm malfunction is one of the most common vehicle problems. At the first manifestations of abnormal operation of the car alarm, measures should be taken to identify the causes of failures, and begin to eliminate them.

Otherwise, a situation is possible when the anti-theft system will refuse access to the passenger compartment or will not allow the engine to be started. Consider the main signs of a malfunctioning car alarm, the causes and ways to eliminate them.

Why is the warning light on the windshield not on?

In this situation, there are three options for the operation of the security system:

1. The alarm works in the normal mode, except for the light indication of the control LED

Most likely, the connection of the main signaling unit with the control LED is broken. Usually, the connection of the indicator LED to the head unit is organized by a two-wire conductor through the chip.

It can be damaged by mechanical influences. The wire is usually laid from the lower zone of the front driver's pillar (there is usually an alarm there) up to the windshield, the driver can touch it with his foot. The connector contact may also loosen or corrode, in which case it should be tightened.

If these steps do not help, you can ring the LED with a multimeter. It rings like a regular diode: in one of the directions, the resistance is equal to infinity, in the reverse connection of the probes, the resistance will be about 600 ohms. If the LED is defective, it must be replaced with any low-power LED of the corresponding color.

2. The alarm does not respond to remote control signals when arming

For example, the LED on the key fob is blinking, the display key fob is working normally, but the car is not locked.

The probable reason is the absence of one of the supply voltages for the alarm or a reliable connection to the body. You should check serving the central alarm unit. They are usually located under the steering wheel on non-standard conductors or sockets.

You should also check using a multimeter for the presence of “+12 Volt” supply voltage on the fuses, the quality of the connection of the blocking alarm relays. If these actions are not successful, using the Valet button, you should try to restore the alarm to its original (factory) state. To do this, follow the instructions that come with the security system kit.

3. The alarm does not respond to remote control signals when disarmed

The LED on the key fob blinks, the display key fob works normally, but the car remains locked.

First of all, you need to open the car with a mechanical key. Then, using the Valet button, remove the car from the alarm, then bring the car alarm to the factory settings. Next, you need to try out the methods listed in the previous paragraph.

What to do if the alarm indicator is constantly on

There are three possible situations for such a car alarm to work:

1. The car is locked and does not respond to the signals of the working key fob

If the car is closed, use the key to open it, disarm it using the Valet button. Most often, the constant glow of the diode indicates a software failure of the security system.

Modern security systems are a complex microprocessor controlled complex. They can freeze like a computer. You can try to restore the factory settings using the Valet button. Sometimes it helps to turn off the alarm from the power supply by removing the fuses that serve it. It is more reliable to disconnect one of the battery terminals for 15-20 minutes.

The Valet button is usually located near the driver's left knee or in a hidden place no further than 50 centimeters from this zone.

A typical way to remove the alarm using a secret button: turn on-off-turn on the ignition, then briefly press the button one (sometimes three, five) times. If the car responds to it, pressing will be accompanied by a sound or light signal.

2. The car is not blocked, does not respond to the signals of the working key fob

The sequence of actions is approximately the same as in the previous paragraph. If there is a spare or additional key fob, you can try its interaction with the alarm.

If the alarm does not react in any way to the Valet button, most likely one of the voltages supplying it is missing, or the main alarm unit is faulty. You can check the health of the unit only by temporarily installing a known-good unit of the same model. It can be temporarily borrowed (not for free, most likely) at a workshop that installs alarms from this manufacturer.

3. The car is not blocked, the alarm is working normally

The probable cause is a breakdown of the control transistor in the head unit of the car alarm.

If it is built into a microcircuit, then such repairs are carried out by replacing the microcircuit, but this cannot always be implemented in practice.

Another possible cause is a short in the wiring leading to the LED.

If the light on the alarm key fob

Solid on

Possible situations:

The reason for the constant glow of the diode may be a breakdown of the control transistor in the key fob. It is located separately on the board or built into the control chip. In the second case, it is cheaper to change the key fob or the entire board. If the transistor is faulty, it can be soldered to a serviceable one. Such repairs require appropriate qualifications.

The probable cause is a software or technical failure of the key fob.

First of all, in such a situation, you should try to temporarily (for 15-20 minutes) remove the key fob battery. Just in case, you need to check the amount of residual voltage on the battery. If it is less than the nominal value by 20 percent, it should be replaced.

At the time of re-installation of the battery, the key fob microcontroller is rebooted, after which it can return to working condition. If this situation repeats again for a short time (month), the key fob should be replaced, after which it must be “registered”.

Does not burn

Possible situations:

1. The car alarm is working normally

Most likely, the cause of such a malfunction is the failure of the LED or corrosion of its soldering point. It is necessary to disassemble the key fob, ring the LED and the additional resistor with a multimeter.

If the LED is working, it is necessary to solder the place where the diode is installed on the board. Sometimes corrosion (cold soldering) is not visible even under a magnifying glass.

2. Alarm does not respond to remote control signals

Typical malfunction. The most likely causes are a low battery or a malfunction of the key fob.

Some car owners are limited to dismantling the battery from the key fob and checking the residual voltage with a multimeter. After making sure that it corresponds to the nominal value, they decide to replace the key fob. This is not entirely correct. Under load, a heavily discharged battery may not provide the current necessary for the normal operation of the key fob circuit. Therefore, it is more reliable to replace the battery.

In the case when the key fob accidentally fell into a puddle, another water environment, was stored in damp conditions, it is possible that mold has formed on its board, corrosion, which leads to high leakage currents, inter-track short circuits. The battery in such a situation can be discharged within a week. It is necessary to disassemble the key fob and clean its board with alcohol. Other solvents should not be used.

Engine start blocking is a feature that is on the list of available options for almost any anti-theft system. In this case, the system has an immobilizer that recognizes the owner by a special label and allows you to start the engine. Ordinary car alarms that have a similar function in their arsenal can also block the engine start.

According to experts who work with automotive electrical equipment, more than half of all unexpected cases are directly related to car alarm malfunctions. Note that the complexity of implementing locks in this case is noticeably simpler compared to complex anti-theft solutions. This significantly increases the chances of removing the engine start lock on your own in the event of a breakdown or failure. Next, we will consider what the driver should do if the alarm blocks the engine from starting.

Read in this article

Engine blocking by car alarm

If anti-theft systems are installed, electrical equipment is responsible for blocking the start of the engine. Immobilizers or car alarms may be faulty and give permanent or single failures during operation.

It must be added that the severity of the problem will depend not on the specific model or brand of car, but on the complexity of the installed protective anti-theft complex.

The main symptom of problems with the alarm is that a serviceable engine will not start or immediately stalls after starting. The motor may not respond to start from the key fob, and also not start with the key. This means that the system has performed a partial or complete blocking.

Accidental activation of the engine blocking function

First of all, carefully study the displayed icons on the alarm key fob. A common cause of blocking is the accidental activation of additional functions. It is also necessary to monitor the indications of the LED control lamp (if any) in the passenger compartment, which serves as a light indicator of the alarm status. The flashing of the LED lamp in most cases indicates that the anti-theft function of the immobilizer is activated in the menu.

If, after turning the key in the lock and switching on, frequent blinking of the signal lamp is observed (for example, the StarLine car alarm) before starting the engine, and an icon with the inscription "immo" is displayed on the key fob itself:

1. one way to solve the problem is to remove the key from the lock, after which it is enough to press the button for opening the central door lock on the key fob.
2. you can also get out of the car, arm the alarm, then disarm and then start the engine.

In other words, you need to make sure that the alarm works in the normal and familiar mode for the owner. Up to 30% of cases of blocking the engine start by an alarm occur due to an accidental change in program settings. The task of the driver is to disable all unnecessary functions in the settings.

On the example of the StarLine signaling, we note that this system has the option of a "two-stage" unlocking. Activation of the function may occur accidentally, a separate icon will light up on the key fob screen. To turn off on the key fob, you must hold down button 3. The key fob will emit two peaks, after which button 3 is pressed once again. Then button 1 is pressed for a few seconds, then the security functions are removed;

Disabling locks using the service button in the cabin

In the event that there are no signs of unintentional activation of the engine start interlocks, you can try to unlock the engine using the service mode. This mode is called Valet and is used to transfer the system to the service mode. To activate, you must insert the key into the ignition, turn on the ignition and then turn it off.

After that, you need to hold the service mode enable button for about 10-20 seconds. The result will be a notification with a special short signal, after which the signal lamp (indicator light, LED) will be on constantly. This method means disabling all security functions, which can also mean unlocking the engine. We add that after the problem is eliminated, it is necessary to activate the security functions of the alarm again.

In some cases, emergency deactivation of the alarm using a hidden button in the passenger compartment also helps. The specified button is also held down from 10 to 20 seconds, after which the alarm status LED lights up and then goes out. After the bulb goes out, you can try to start the engine.

Self troubleshooting alarm

• It is often possible to troubleshoot and remove the engine lock with your own hands if you can find blown fuses. This problem often leads to alarm malfunctions. The fuses must be checked, if a problem element is found, it is necessary to replace the blown fuse with a known good one.
• Malfunctions in the operation of the alarm can also be associated with insufficient charge or loose terminals on the battery contacts. In this case, the battery is still able to crank the starter sluggishly, but the engine block may already work and further prevent the engine from starting.

When the battery is discharged, a protective function may be activated that blocks the engine from starting as a result of a power failure or a voltage drop in the vehicle's electrical circuit.

• Another step is to check the limit switches (limit switches), which are located under the hood and trunk. Moisture ingress or oxidation of the limit switch often causes an incorrect signal to the alarm control unit, which leads to engine blocking. Please note that unprofessional installation of alarms and limit switches, as well as improperly carried out, can lead to malfunctions in electrical equipment.

If attempts to remove the engine locks and start the engine were unsuccessful, then there is a high probability of a serious failure or failure of individual alarm elements. The result is an arbitrary operation of engine blocking, which cannot be disabled by standard methods. The faulty machine must be taken to a workshop, as the removal of the blockage will require professional intervention.

You can carry out the specified delivery by a tow truck. Another affordable way is to call an auto electrician who works on the road. Note that the final costs of paying for the service of exit engine unlocking, disabling the car alarm, emergency opening of locks, etc. often turn out to be less than the delivery of the car to the service center on a tow truck and payment for repairs at the technical center.

Read also

Why does the starter turn normally, but the engine does not catch, does not start. The main causes of the malfunction, checking the fuel supply systems, ignition. Adviсe.

The operating modes of the car alarm are controlled by the alarm indicator light. The alarm status is monitored without using a key fob with an LCD screen. Depending on what mode the security device is in, the alarm lamp is on, blinking or at rest (not on). The article presents a brief analysis of the LED indicators of several types of alarms.

Alarm light options

Each developer of a car alarm puts a certain state of the LED into the functioning algorithm. Under different conditions, it burns, blinks, flashes alternately, or is in an extinct state.

Below is a table of light bulb states (solid on, blinking, resting) placed on the machine.

The PANDORA car alarm (more about) uses a three-color light bulb. The car alarm indicator on the car is on or blinking, we suggest that you familiarize yourself with the table below.

The LED can blink from 1 to 3 times per second or does not glow at all.

Different states of the warning light

Today, vehicles without car alarms are some models of the classics of the distant Soviet period. Security systems are mounted at service stations, supplied with cars from manufacturers. Like all technical means, they are prone to breakdowns and failures. A light bulb signals a failure, it burns all the time, blinks non-stop or goes out completely. Let's take a look at the most common situations.

Reasons for the constant burning of a light bulb

A constantly burning car signal light indicates that something is wrong with the car alarm. The reasons can be very different, among the main reasons why it burns are considered:

Accidental activation of the "VALET" mode. In normal modes, it is activated in car alarms by combinations of key fob buttons. Unintentionally pressed activation buttons cause the LED to glow continuously, which causes unpredictable actions of the car driver when the light does not blink, but is on all the time. If the alarm service mode is accidentally activated, the security options are deactivated. There is an option that remotely controls the opening and closing of the door locks, hood, trunk of the car. Reduction to working condition is carried out in accordance with the operating instructions for the car alarm.

Technical breakdowns. In cases where the light should blink, but it is on, problems should be sought in the technical component of the alarm. One of the reasons is problems with limit switches. The essence of the problem often lies in the oxidation, burnout of the contacts of the limit switch. As a result, the car alarm circuit is not closed, the LED is constantly on, the car is unprotected. The problem is eliminated by cleaning the contacts, replacing the switches. Another problem, when the car alarm light does not blink, but is on, occurs when the device's sensors fail. Properly, the problem is solved in service centers.

Failure in software or hardware. If the LED on the machine continues to burn after checking the above reasons, there are problems in the main car alarm unit. An accurate diagnosis will be made by specialists of the service center with subsequent troubleshooting.

Reasons for the frequent flashing of the alarm lamp

A common problem in vehicle signaling is the frequent blinking of the indicator light, followed by blocking the engine start. One of the reasons is the incorrect operation of the limit switches, the closing parts of the car. It is enough to fail one of them and there is a failure in the correct operation of the device. It is enough to clean the contacts or replace the switches.

Another reason is the incorrect location of the temperature control sensor of the power unit. The car alarm LED will start working normally if the sensor is reinstalled according to the instruction manual.

The alarm lamp has stopped burning - causes

In the practice of motorists, there are situations when the alarm LED does not light up at all and does not blink. Experience shows that the main reasons can be as follows:

• The main unit overheats;
• Errors during installation, when the power is turned off, the alarm returns to the factory settings;
• Contacts, wiring, fuses burn out.

Diagnostics of specialists will help to accurately determine the problems in the security system on the car. For a car owner who is ignorant of the nuances of electronics, it is difficult to identify the reason why the LED does not light up. Service centers that have devices and tools will most efficiently restore the alarm so that the light meets its purpose: when necessary, it blinks; when necessary, it burns.

So, this article discusses the main reasons for what problems there may be in a car alarm, determined by the state of the light bulb. It burns continuously; blinking out of place; does not glow.

As a result, it was revealed that alarm problems are related to the operating state of the limit switches. Sometimes sensors become the cause of the incorrect behavior of the car alarm LED. There are problems with the main processor unit: hardware failure; incorrect operation of the software.

Timely diagnostics, troubleshooting will save the car from intruders, theft.

In this material, we will consider the question of many car owners regarding, namely, why is the alarm light constantly on? But, as expected, we can not do without a little preface.

The alarm light is constantly on - a problem that motorists often face

The evolution of the automotive industry never stands still. Comfort, safety, reliability, power, quality of control and so on increase. Undoubtedly, along with the growth of the automotive industry, the prices of cars are also growing. The car protection system does not lag behind the general development. If earlier the only thing that protected your car from intruders was a lock that opens with a simple key, now whole complexes of electronic security systems have come into play, popularly referred to as simply an alarm. Such systems provide not only highly effective protection, but also improve the comfortable use of your “iron friend”, for example, with such functions as: remote control of door locks, hood lids, luggage compartment lids, and also provide the ability to remotely control power windows and start the engine.

These days it’s quite difficult to find a car without an installed one, except perhaps an old Moskvich, which has long been gathering dust in the garage of an equally young grandfather. And more modern models are already initially equipped with regular electronic protection devices from the automaker. However, electronic security systems have the unpleasant property of breaking down, “failing” and giving other failures that make negative changes to the daily routine that is familiar to us.

Most car owners determine the status of their “signaling” by the LED lamp, which is made in order to display the current status of the protection system with various light signals. However, not everyone has an idea of ​​what kind of light signal means this or that alarm condition. Most are guided by what signs the LED has given since it was installed in the car, mainly this is measured blinking. And as soon as this very blinking turns into something else, then every car owner certainly considers it his duty to dig into the protection system and find out what the matter is. On the one hand, this is right, because no one wants to leave their car in the care of "inadequate". On the other hand, if you are not a car thief or an employee of a service station, then it will be quite difficult to understand such complex devices, and it is fraught with a final breakdown of the security system. And perhaps the most frequent question, which is usually followed by picking the “signal”, is why the alarm light is constantly on? This is what we will try to answer you further.

Reasons why the LED is constantly on

There are several reasons why the alarm lamp is constantly on:

• The most common reason is the running service mode "Valet" (Jack).
• The second fairly common cause is a malfunction of the door, hood and trunk limit switches.
• Well, a less common reason why the alarm light is constantly on is a software failure in the operation of the security system itself, as well as the failure of one or more sensors.

After reviewing the list, let's look at all the items in more detail, and start with perhaps the most common cause, the occurrence of which is most likely.

Service mode "VALET" (Jack)

The very designation "service" already indicates that this function is intended for service work both in the security system itself and in the car as a whole. In this mode, all security functions of the device are deactivated and does not react to anything. The entire functionality of the alarm in this state is reduced only to the possibility of remote opening and closing of the locks of doors, hood and trunk. At the same time, the LED lamp stops flashing and switches to the continuous operation mode; on some devices, the lamp goes out when the engine is running.

The activation of the mode on most devices is carried out from the remote control by pressing a certain combination of buttons. Thus, if you carry the remote in your pocket, then the buttons could accidentally be pressed in the desired combination, thereby activating the mode. Basically, such combinations consist of simultaneously pressing and holding two or three buttons, complex combinations of successive pressing of the corresponding buttons are less common.

There are systems that do not provide for the inclusion of such modes through the remote control. For such devices, a button is installed in the cabin, and is called “Valet”. Such a button in the cabin is a real happiness for car thieves, since it allows you to instantly turn off all car protection, including engine control. Therefore, having found such a button, an attacker can easily drive off on your car wherever he pleases.

How to find the "Valet" button

When installing an anti-theft device, each owner has the right to choose the location of such a button. A similar button is placed in secluded corners of the car, and the better you hide it, the more likely it is that the hijacker will not find it. You can install it anywhere, even in the trunk or under the hood. But if for some reason you did not take such part in installing the alarm, then basically, by default, the button is placed under the steering column, covering it with an inconspicuous plug.

If there is nothing under the steering column, in this case we recommend that you look at the technical instructions for your alarm, namely the location and designation of the output sockets to which various sensors are connected, and our cherished button. Having found the right connector, just follow the wire leading from it, and in the end you will run into what you were looking for.

If the alarm remote control has a display, then when the Valet mode is on, the icon in the form of the letter “Z” is displayed on the screen in most cases. In order to deactivate the mode using the button in the passenger compartment, press and hold it for about ten to fifteen seconds, after which the car will emit several short beeps, accompanied by light signals of the parking lights, and the LED lamp in the passenger compartment will turn off.

However, this method of activating and deactivating the mode is not suitable for all devices, just like the key combination on the remote control each manufacturer has its own. Below we will provide combinations of the necessary buttons on the remote control of the most popular alarms. For more detailed information on enabling and disabling the mode in systems not included in our list, please refer to the instructions or contact the service center of the manufacturer of your security system.

Activation and deactivation of the "Valet" function in the Star Line Twage B6 alarm

To activate using the remote control, hold down the three key until the remote control emits one long and two short beeps. One of the icons will flash on the remote control screen. By briefly pressing the three key, set the blinking of the “VALET” icon. Press the key one, after which the car will notify you with a light signal of side lights, and the remote control will emit two short and two long beeps. After that, the “VALET” icon will be constantly displayed on the remote control screen, and the LED lamp will switch to the permanent mode.

Deactivation is performed by pressing key two, after which “VALET” will no longer be displayed on the remote control screen, and the alarm lamp in the cabin will go out. Similar manipulations are applicable to the Star Line Twage B9 system.

Activating and deactivating the "Valet" function and alarm Scher Khan Magicar 5

To activate the mode, simultaneously press and hold for no more than one second the "I" and "III" keys. Be sure to observe the duration of holding the keys, since the same combination, when held for two seconds, deactivates the shock sensor.

To deactivate the Jack, repeat the activation combination - "I" and "III" hold for no more than a second. If the shock sensor is accidentally deactivated, then press the "I" and "III" keys and hold for at least two seconds. Similar combinations are also used in the Scher Khan Magicar 6 system.

Technical and software problems

Another common reason why the alarm light is constantly on is faulty limit switches, hood and luggage compartment. The limit switch is a small button that is installed in the car door. The security system unit is connected to them, when the door is closed, the limit switch button is pressed, thereby closing the circuit. The alarm thus understands that the door is closed. Faulty, oxidized contacts in the limit switch may not close the circuit, as a result of which the protection system may not understand the current situation, and will notify you of an allegedly unprotected place in the car with the constant operation of the LED light. Such problems can be eliminated on your own, you just need to disassemble all the limit switches, thoroughly clean the contacts, rinse in alcohol and lubricate with electrically conductive grease. Then you can re-install the buttons in their original place.

Although in rare cases, but still the answer to the question why the light is constantly on, various sensors that have failed, for example, such as shock, volume and body position sensors, can serve. In such cases, it is better to contact the service center for help. Also, you should contact a specialized center for help if the alarm lamp is constantly on due to a software or hardware failure in the security system unit itself. If none of the checks of the above reasons gave a positive result, then most likely the failure is in the alarm unit.

In conclusion, we wish that from now on you will never again be tormented by the question of why the alarm light is constantly on, as well as restful sleep at night without worrying that someone will take your “iron friend” away.

Now it is difficult to find a car without an alarm. Some receive a security system at the factory, some later - at the service station. But there are situations when yesterday everything was still working, and today the alarm light is constantly on or blinking. What to do, and is it necessary to do something in such cases?

Causes

What does such a light bulb mean? Often this is a signal to the driver (or owner) that something is wrong with the system. Let's analyze the most common cases why the alarm light is constantly on. There can be many reasons, but there are only three main ones:

• accidentally pressing buttons on the key fob;
• there is no contact on the door switches or hood / trunk lids;
• the system as a whole or individual sensors do not work.

If for the latter case the recipe is universal - a service center, then the first two can often be solved by yourself.

Important! If the lights are on, the security system is partially working or not working at all.

We will talk about trailers below, because in almost all cases, the reason is the same, and it is solved according to one recipe. In addition to the fact that the alarm light is constantly on, this can be understood by other signs. And now consider the first point - accidentally pressing the buttons on the key fob.

If the owner carries the key fob in his pocket, then a random movement can press a sequential combination that includes the so-called service mode. While the mode is running, the blue alarm lamp is lit on the owner's call sensor. The mode is designed to service both signaling components and the entire machine as a whole, and is activated by masters at the station.

Locks work in this mode, and that's it. Sometimes in the documentation this mode is called "valet" or "valent".

Attention! In this mode, the alarm is disabled (does not work).

However, practice shows that the mode can be turned on by accident.

Flashing light bulbs in popular alarm models

sherkhan

So, we have a lamp on the Sherkhan alarm constantly on. How to check if the service mode is enabled, and if so, disable it? Note that not only for Sherkhan, but for most systems, the key combination is written on the back of the key fob. Also, the owner should remember that the service mode indicator is blue. In other words, if a blue light is on on the Sherkhan alarm, the first thing you need to pay attention to is the accidental activation of the service mode. Sometimes, in the case of an LCD keyfob, it may display a character that resembles one or more of the Latin "Z".

To disable (or enable) maintenance mode, the owner must press buttons "1" and "3" at the same time by holding them down for one second.

Attention! Holding for two seconds will turn off the shock sensor, which will not be indicated in the service mode.

If everything is pressed correctly, the light goes out. Sometimes, depending on the modification of the security system, the car may respond with beeps or flashing headlights.

Sherkhan can illuminate almost every event with light bulbs. Sometimes the light bulb will not be blue, but red. A red light anywhere needs attention. If a red light is constantly on on the Sherkhan 5 alarm, you definitely need to pay attention to this. The security system indicates the presence of one of two problems:

• the battery is discharged below the mark for a normal engine start. Most often, it is already impossible to leave by such a car;
• the car needs a visit to a service center because the malfunctions are of an extraordinary order.

We will not dwell on these options in detail. If the car starts - you need a center, if it doesn't start - you need a new battery. However, Sherkhan 5 is just an example. All of the above applies to other models of this system. In any case, if the Sherkhan alarm light is on, then something needs to be adjusted.

Starline

If your car has a Starline system, then everything described above, in principle, is also suitable in this case, with the exception of one little thing. In the latest Starline alarm models, the light blinks, and does not burn constantly, like Sherkhan's.

Disabling Valet will also look different.

Attention! Enabling the mode allows you to open the car, other security functions are deactivated.

And if in normal mode we turn off the alarm, then open the car, then under normal conditions nothing will blink. However, when you turn on the Starline alarm service mode “car is open”, the light will continue to blink. Again, this is not a problem. The car can be used, moved around the city, but the blinking alarm lamp when driving will remind you that the security functions are currently deactivated.

To disable the valet in the Starline alarm system, just press the button "2" once(in the figure, the middle button is on top). At the same time, the lamp should go out, and the “VALET” mark will disappear on the key fob display.

Tomahawk

The developers of the Tomahawk system took a slightly different path. Unlike Sherkhan, who gives a lot of information with different lights, in the Tomahawk alarm only one lights up when both the service mode and the “passive immobilizer” function are turned on. At the same time, the difference in modes is visible when “disarming the car”. The immobilizer will turn off the bulb when it is removed again, the service mode will not. Removal from the service mode is carried out by several pressing the "z" button on the key fob. This is implemented differently in different versions, so you need to look at the instructions. Usually once with a hold and once briefly.

Pandora

The red light, as mentioned above, is a reason to pay attention. If a red light is on on the Pandora alarm, communication with the key fob is possible. At the same time, the loss is not constant, sometimes everything works normally. Here it is worth paying attention to the fact that according to the specification, this security system checks the connection only in armed mode. There are no checks at other times. Often, either the key fob battery or the contacts in it can be to blame for this. If replacing and checking contacts does not help, only to a service center.

limit switches

Before writing about limit switches (limit switches), it is necessary to separately mention the feature of the Starline security system. At a good speed, in some cars, the air flow, running on the hood, can raise it a little. But Starline's hood contacts are located so that the signal lamp will be on while driving, indicating that the hood cover is "not closed."

You can also note the limit switch on the trunk of cars in which the Sherkhan system is installed. As long as the trunk is not tightly closed (for example, due to non-standard cargo), the blue light on the Sherkhan alarm will be constantly on.

This is what the trailer might look like.

If the owner has checked the "immobilizer" functions, and is sure that the service mode is not enabled, it is necessary to check the limit switches of all doors and not just the hood. If the contact is oxidized, dirty, or the cover presses on it with insufficient force, this is the second reason why the light is on on the alarm. Checking and cleaning - usually solves the problem, after which the light goes out.

Light bulb not flashing

Finally, let's analyze a special case when everything worked before, but now the alarm light has stopped blinking. As in other cases, there are several solutions:

• at the service station they were too clever;
• The alarm works, it just doesn't blink.

In both cases, the problem can only be finally solved at the service station.. Just note that the owner knows the answer to the first option. The second case can be diagnosed at home, before a trip to the service station. If the light just goes out, the alarm in this case is working normally. Turn on as usual, and then check. If the security system senses an alarm, the owner will immediately understand it. If nothing happens, decide only through the station. For ease of testing, some sources recommend trying while sitting in a car.

Advice! It's still worth contacting the service station. The alarm lamp is a health indicator.

Sometimes the light bulb goes out in another case. A reaction that can only manifest itself over time, and only on the driver's door. This is not the case here, as mentioned above. You need to check the contacts in the lock activator. It is diagnosed simply - at times the lock sticks (does not freeze).

A constantly burning light bulb in this article was mentioned repeatedly.

In conclusion, it should be noted that the security system today includes a number of parameters, and the question of what to do if the alarm light is constantly on should not arise from the current owner. First you need to diagnose yourself (in particular, the maintenance mode), and do not delay visiting the service center. Of course, the on-board computer often helps in diagnosing, but there is something that he simply does not understand what is the norm and what is a problem.