Table of contents: Constant control ↓ Malfunction of direction indicators ↓ Removal the relay-breaker ↓ Temporary help for a faulty circuit… ↓
Brake lights, turn signals and horn are the speech organs of the car. Without this equipment, the car becomes mute in relation to other road users. But let's talk to each other.
Constant control
The hazard warning system must always be in working order, so its switch is powered from the positive battery terminal directly through the fuse. In contrast, the direction indicators receive voltage from terminal 15 only when the ignition is on.
1. With the ignition off, press the hazard warning switch on the instrument panel.
2. All six direction indicator lamps, the indicator lamp in the hazard warning switch and both direction indicator lamps flash in the same rhythm.
3. Turn off the hazard warning lights and turn on the ignition.
4. When you press the direction indicator lever, all the lights on the corresponding side and the green indicator light associated with them flash rhythmically.
Malfunction of direction indicators
If the green indicator light only flashes briefly when the ignition is on, then one of the bulbs in the front or rear has failed. However, the failed side turn signal light is not registered. In the flashing of the hazard warning lights, a burnt-out bulb is also not noticeable by the rhythm of the turn signals. For information on replacing bulbs, see the chapter Lighting.
If the lights are constantly on when the turn signals or hazard warning lights are on, then the flasher relay is faulty.
If the direction indicators flash at a slow or fast rate and all plug connections, including the wire of the lights connected to the ground, are in order, you need to replace the relay in the hazard warning switch.
If only the hazard warning lights are working without the direction indicators or vice versa, then no voltage is supplied through the corresponding fuse (see table in chapter Electrical equipment) or the hazard warning switch is faulty (for dismantling, see the chapter Tools and Instruments).
Removal the relay-breaker
The flasher relay (1) in the Audi A4 is integrated into the hazard warning switch. It is removed in the same way as the rocker switch in the instrument panel ("Instruments and instruments").**
The flasher relay in the Audi A4 is not on the relay support. It is integrated into the hazard warning switch. Reason: saving on the mounting element. Here about dismantling:
1. Carefully press the switch key with a small screwdriver.
2. Grasp the sides of the switch with pliers and remove it from the mounting hole.
Temporary help for a faulty circuit breaker relay
If the relay-breaker fails, further driving is unsafe, especially in the dark, road users will not know about your intention to turn. In this case:
1. Remove the hazard warning switch with relay-breaker and disconnect the connector.
2. Make a jumper between terminals 1 and 6.
3. To do this, insert a paper clip or a short piece of wire from the back into the corresponding slots so as to connect the connector contacts.
4. Insulate the wire.
5. Now, if you press the turn signal lever, one side lights up constantly.
6. By turning the turn signal lever on and off, you will get an intermittent rhythm.