Permanent check
The hazard warning light must be always ready for operation, so its switch is powered through a fuse directly from the positive pole of the battery. Direction indicators, on the other hand, are powered by terminal 15 only when the ignition is on.
Press the hazard warning switch on the instrument panel with the ignition off.
All four direction indicators, control lamp in the switch «emergency gangs» and both indicator lights should start flashing at the same rate.
Turn off the warning lights, turn on the ignition.
When you press the turn signal lever, one side of the turn signal lights and the green turn indicator corresponding to the selected direction should flash regularly.
Turn signal malfunctions
If, with the direction indicators on, the green indicator flashes at an accelerated pace, it means that one of the incandescent bulbs has burned out. If one of the alarm lamps fails, this does not affect the flashing rhythm in any way. Lamp replacement is described in chapter «Lighting».
If the indicators are constantly on when the direction indicators or the hazard warning lights are turned on, then the direction indicator relay is faulty, see the following text.
If the direction indicators flash slowly, then quickly, and all plug connections, including the wire on «mass», OK, so the relay needs to be replaced.
If only the hazard warning lights work, but not the direction indicators, or vice versa, then there is no power through the corresponding fuse or the corresponding switch is faulty (removal, see chapter «Instruments and accessories»).
The turn signal relay on the Audi-100 is not located in the relay box, but separately, and is attached with a bracket at the dashboard. So the characteristic sound of interruption is better heard. Removal is described below.
Removed turn signal breaker
Remove instrument panel.
Pull out the relay with connected wires and bracket.
Disconnect the multi-pin plug.
Help about a malfunction of the turn signal relay
Driving with a faulty turn signal is not so safe, because in heavy traffic, and especially in the dark, your intention to turn will not be entirely clear to other road users. In this case:
Remove the turn signal relay.
Install a jumper between terminals 49 and 49a.
Wrap a paper clip or short plug tabs around the relay and insert it again.
When the turn signal lever is pressed, the lamps will now be on permanently.
By turning them on and off with the lever, you can achieve rhythmic flashing.
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