Main faults of the lighting and light signaling system (VAZ-2109)

Some lamps of the headlights and lanterns do not light

Causes of the malfunction and ways to eliminate it:

• the fuse has blown table 3 see what other lamps this fuse protects, and if they also do not light, then replace this fuse. If the other lamps light, then either the lamp has burned out or there is no voltage supplied to it;
• the lamp filament has burned out. Remove the lamp from the flashlight and check if the filament is intact. You can also check by connecting the lamp to the battery using two wires. Replace the burned out lamp;
• the wires are damaged, the tips are oxidized or their connections are loose. If the fuse and the lamp are in good condition, then it is necessary to check all the wires and their connections through which voltage is supplied to this lamp, and replace the damaged wires. Such a check is conveniently done with the help of a test lamp, connecting one of its terminals to the "ground" and touching the wire plugs with the other. The lighting of the test lamp will indicate that there is voltage at the test point;
• oxidation of the contact jumpers at the place of installation of the lamp control relay in the mounting block. Check, clean the contact jumpers 5 (see figure 92).

The steering column switch levers do not lock

The reason is the destruction of the lever locks. Replace the damaged switch.

Low or high beam headlights do not turn on

If the lamp of only one headlight does not turn on, then troubleshoot as described above. If the lamps of both headlights do not turn on, then the causes of the malfunction and methods for its elimination may be as follows:

• the relay for switching on the low or high beam headlights is faulty. This can be easily checked by temporarily replacing the relay with any other similar one located in the mounting block. If the lamps light up after this, then the relay is indeed faulty. You need to remove the cover from it and clean the contacts with fine-grained sandpaper. Connect the "85" and "86" plugs of the relay to the pole terminals of the battery, check whether it works. Replace the faulty relay;
• the contacts of the headlight switch are oxidized or worn out. Remove the switch from the socket and check whether contacts "56" close with contacts "56a" and "56b". You can check this with a test lamp or an ohmmeter. Replace the damaged switch.

Headlights and parking lights do not work

When the exterior lighting is turned on, the side lights in the headlights and taillights do not light up, the high and low beams of the headlights also do not turn on, but the high beam signaling works (when moving the left lever of the steering column switch towards you). In this case, the exterior lighting switch does not work. Remove it from the socket by pulling it towards you and use a test lamp or ohmmeter to check whether contact "x" closes with contact "56" and contact "30" with contacts "58", "58L" and "58R". Replace the damaged switch.

Direction indicators do not turn off automatically after completing a turn

(The information is published on the website vazbook.ru)

The reason is the jamming of the switch lever return mechanism, or damage to the return mechanism parts. The switch can be used further, manually turning off the turn signals after completing the turn. If possible, replace the damaged switch.

The turn signal indicator lamp flashes at double speed when the turn signals are turned on

Causes of the malfunction and ways to eliminate it:

• the bulb of one of the turn signals has burned out. Check if the turn signal bulbs are on, replace the burnt out bulb;
• the power supply wires to the turn signal lamp are damaged or the connections of these wires are oxidized. If the turn signal lamps are in good condition but do not light, then you need to check the wires and their connections, replace the damaged wires;
• the flasher relay for the direction indicators and hazard warning lights is damaged. If all the direction indicator lamps also flash at double the frequency, then the faulty flasher relay must be replaced.

The brake lights do not turn on when the brake pedal is pressed in both rear lights

Causes of the malfunction and ways to eliminate it:

• fuse "6" in the fuse box has blown. If the interior light does not turn on, then the fuse has indeed blown. Replace it;
• the brake light switch is faulty. Using a test lamp or ohmmeter, check whether the switch contacts close when the brake pedal is pressed. Replace the faulty switch;
• the wires are damaged or there are bad contacts in the connections of the wires going from the brake light switch to the rear light bulbs. Check the wires and their connections, replace damaged wires.