1. Get in the car and make sure the clock is working (digital or electronic)
2. Turn on the ignition. The control lights should light up:
- battery charging,
- ABS (briefly),
- airbags (goes out after about 10 seconds), and with the handbrake on
- hand brake warning lamp.
A car without a diagnostic unit for the functioning of the main systems
On the light panel of the instrument panel between the speedometer and the tachometer, the coolant temperature control lamp and the brake system control lamp should flash, and the oil pressure control lamp should also be on.
Cars with a block for diagnosing the functioning of the main systems On the light panel of the instrument panel between the speedometer and tachometer, when the ignition is turned on, the inscription appears «Bremslicht» (stop signal). After a short press on the brake pedal, the inscription should light up «OK» (in order).
With a slight delay, the arrows of the fuel gauge and coolant temperature gauge deviate (only on warm engine).
3. Turn on your turn signals. Depending on the side of the turn, the corresponding green indicator light should flash rhythmically.
4. Press the hazard switch button. The signal lamp in the switch and both control lamps of indexes of turn should blink.
5. Pull the headlight stalk lever towards the steering wheel. The high beam indicator light should come on.
6. Start the engine and check that the tachometer is working.
7. Carry out a test drive and check that the speedometer and coolant temperature gauge work.
Stoplight switch
The brake light switch on the AUDI 80 is located above the brake pedal and can only be accessed after removing the instrument panel trim on the left (see illustration 7.0).
When you press the pedal, the switch stem extends and closes the contacts for turning on the brake lights.
Stoplight switch adjustment
8. Remove facing at the left under the panel of devices.
9. Press the brake pedal with your hand.
10. Move the switch along its guides to the extreme forward position.
11. Release a brake pedal, and the switch take away back against the stop. The switch will then reset itself.
When both rear brake lights do not come on, check the switch.
12. Disconnect the switch plug.
13. Bridge the terminals of the disconnected plug. If the brake lights come on, the switch is faulty.
Checking the protective coating of the bottom
The protective coating layer on the bottom of the machine should be carefully checked and, if necessary, renewed. The car owner can do this on his own with a device for lifting the car (flyover or lift).
14. Wash the bottom thoroughly.
15. Illuminate the entire surface of the bottom with a sufficiently powerful lamp and determine the damaged areas.
16. Clean areas with damaged protective layer with a spatula, scraper and wire brush to «naked» metal. Remove rust stains as well «naked» metal.
17. Apply a coat of paint containing zinc powder as a primer to the cleaned surface. On flat or large surfaces, the protective composition can be applied with a brush. Apply a protective compound to hard-to-reach joints and corners with a spray gun.
Attention! Bitumen-based underbody protection should only be repaired using bituminous materials. The plastic protective coating of the wheel arches should only be restored with a PVC-based protective coating.
Note: Only certain materials may be used when repairing the underbody protective coating. Materials not designed for this purpose will corrode the standard bottom cover. In addition to products from Volkswagen and Audi, it is also possible to use Teroson products in aerosol and brush-on paste form. When applying a protective layer to the bottom with a spray, cover the brakes with sheets of paper or film.
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