The stop light does not light: possible causes, problem resolution and recommendations

Often the car owners have a situation,when the rear brake lights are not lit. An experienced motorist can guess what the reason may be. Therefore, it will not be difficult for him to determine the source of the malfunction, to eliminate the problem. For beginners and inexperienced owners, it is advisable to contact specialists or learn reliable information on car repairs.

This article outlines the main causes of such a malfunction and provides recommendations for its elimination. The owner of the car can repair himself or contact a car service center.

Causes of malfunction

The main reasons for this malfunction are:

• defective or burnt out light bulb;
• breakage in wiring or plug-in connections;
• fuse blown due to short circuit or overload in the on-board network;
• failure of the limit switch;
• malfunctions in electronic systems or blocks.

Such malfunctions can usually occur on vehicles with high mileage. However, there are exceptions.

Troubleshooting options

As can be seen from the above, there can be several reasons. But such knowledge is not enough, you need to be able to determine the location of damage, and also use diagnostic devices.

Action to eliminatemalfunction, largely depend on its external features. They determine the location of the alleged damage. The following are the three main manifestations of the failure of the stop indicators.

Stop lamps do not light up completely

If the car completely ceased to burnstop lamps, it is necessary to search for an open in wires, in the limit switch or a faulty fuse. Search for breakage should begin with the fuse block. On its cover is usually indicated the table, which circuit is protected by a fuse-link. If it is missing or information in it is unreadable, you can use the instruction manual of this car.

If the required fuse is blown, change itit is impossible until the cause is determined. This usually occurs during short-term short-circuits or damage to the insulation of the wires and touching the housing. A similar effect is observed when water enters the electrical connections. In this case, it is necessary to dry the place in which moisture has fallen. To speed up the process, you can use a building hair dryer (with caution, so as not to melt the insulation of the wires or elements of the skin). Then it is necessary to remove the fuse from the holder and call the multimeter after it.

Often wires are rubbed at the place of their transition frombody to the trunk lid. As a rule, it is necessary to remove the skin to detect damage to the cables. Therefore, in the absence of proper experience, it is better to instruct this service center. If damage is detected, it is necessary to restore the insulation coating. To do this, you can use an ordinary insulation tape.

If the fuse is OK, you can assumefailure of the limit switch. It is in the pedal assembly. It is necessary to inspect the status of the switch and call it with a multimeter while the brake pedal is depressed. The multimeter should show a resistance of less than 1 ohm. If it is large or the switch has mechanical damage, it must be replaced. In view of the complexity of such an operation, it is better to assign it to experienced car service workers.

If both the fuse and the limit switch are nothave damage, this indicates a broken wire. To search for such a malfunction, an opening of the skin is also required. In the absence of experience, it is better to entrust these actions to car service.

In the event that a wire break is detected,It is necessary to clean the insulation layer from the wire, make a connection and insulate the joint. The break at the wire section is eliminated by soldering. To insulate the connection, you can put the heat-shrinkable tube on and heat it up to the fixation on the wire. When the terminal is broken, it is removed from the plastic housing and replaced with a new one, crimping the stripped end of the wire in it, then inserting it back.

Single brake light does not light up

If only one stop signal is not lit, thenThe lamp is most likely to malfunction or a bad contact in the chuck. In this case, you need to disassemble the trunk lining from the side of the car where a non-burning signal is detected. If necessary, remove the lamp unit, remove them from the cartridges or holders, carefully inspect the contacts in the cartridge and on the lamp base.

Presence of rust, oxidation traces (white orgreenish plaque), smoking, and also dust or moisture confirms that the stop light does not light because there is no or poor contact in the chain. Cleaning of the specified places will help to eliminate the malfunction. To remove rust and oxides, you need a sharp object, such as a screwdriver. Also it is necessary to check the serviceability of the lamp. To do this, you can use the multimeter or the voltage of the on-board network, led to the lamp wires through the fuse. The burnt out lamp is replaced with a similar new one.

The additional stoplight does not light

If the additional stop light does not light, thisindicates a break in its wires or an unreliable connection. It is usually connected to one of the standard cartridges for stop lamp lamps. It must be ensured that the wires are securely fastened and there are no oxidation traces.

If they are available, cut the damagedend the wire, re-clean it and connect it to the cartridge. If the cable is cut off elsewhere, it is advisable to stretch the new one. It is better to use a thicker wire (to avoid a repetition of the malfunction).

Malfunction of LED stop indicators

If after carrying out the measures described aboveit is not possible to determine the reason why the stop lamps do not light, the type of lamps used should be clarified. They can be made with LEDs. Their installation has a number of features. Usually, the LED lamps have a certain polarity of connection to the vehicle's on-board network.

Manufacturers always take it into account when developing. Incorrect connection leads to the fact that the lamp does not light up. In some cases, such inclusion may damage it. If a polarity of the connection is detected, this indicates that the car was repaired by an unqualified person.

Malfunction of the generator of the car

LED lamps are very sensitive to throwsvoltage in the on-board network (along with it there is an increase in current through the LEDs, which leads to their destruction). Voltage can increase if the generator components (namely the stabilizer) fail. Especially often this is manifested in domestic cars due to the lower quality of component parts compared to more well-known brands.

Therefore, if the stop light on the VAZ 2114 or on another model (if LED lamps are used) does not light, you should also check the generator and replace the damaged element, then change the lamp.

Such a malfunction may occur periodicallyand is associated with the wear and tear of the entire generator. If the brake lights do not light on the VAZ 2115 and other breakages often occur, you should also consider replacing it with a more reliable car (in some cases it is more profitable than constantly investing in endless repairs).

Failure of stop lamps together with other indicators

Quite often, a stop lamp lamp is usedtogether with the overall lighting of the car. In one cylinder there are two filaments, one end of which is connected to the cap, and the other two are connected to separate contacts. If the stop lamps and dimensions are not lit, the most likely loss of contact at the place of their connection with the body ("mass") of the car or in the cartridge. This can happen due to wire breakage or oxidation. The tapped end is connected to the terminal by soldering or crimping. Oxides are cleaned with a sharp tool (knife or screwdriver), after repair, the joint site should be covered with paint or solidol to prevent re-oxidation.

It is rare that a malfunction occurs whenon the car does not burn not only a stop signal, but also other indicators. Usually this is observed on machines "drowned", somehow or other visited the water (as a result of careless driving or accidents). Even after careful drying, moisture remains in the interior of the interior and electronic components. Its presence leads to increased oxidation of current-conducting surfaces. In such a car, by eliminating the malfunction of one system, you can not be sure that it will not appear again.

Other causes of brake light failure

Sometimes the reason why the stop light on the car does not light up is the failure of the electronics. In this case, the car should be taken to a service station.

There are also exceptions, for example, whena defective light is caught. In addition, the lamps can burn out due to natural wear. In these cases, the problem is solved by simply replacing them.

Do not forget that you only need to go to a proven workshop. Often, the intervention of unskilled workers leads to the appearance of additional malfunctions.