Audi 80/90/Coupe

since 1986-1991 of release

Repair and car operation

Audi 80/90/Coupe
- 1.2. Car identification
   1. Maintenance instruction
   1.3. Arrangement of identification plates
   1.4. Dashboard
   + 1.5. Car service
   - 1.6. Independent service of the car
      1.6.2. Small-sized spare wheel
      1.6.3. Wheel replacement
      - 1.6.4. Safety locks Color designations
         + Capacity of safety locks
      + 1.6.5. Replacement of bulbs
      1.6.6. Car audio replacement
      1.6.7. Car lifting
      1.6.8. General rules of towage
   + 1.7. Specifications
   1.8. Capacities
   1.9. Sizes
   1.10. Loadings
   1.11. Schedule preventive car servicings / greasings
+ 2. Engines, carburetors
3. Greasing system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Ignition system
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
+ 13. Central air
+ 14. Electric equipment


1.6.4. Safety locks


The exit of any system of electric equipment can be out of operation caused by the fused safety lock.

Safety locks are collected in one block. The block of safety locks / relay is located under a cowl of an impellent compartment. Safety locks are closed by a cover.

On the block of safety locks there are four spare safety locks of different capacity. It is quite good to have a set of spare safety locks in the car. They can be got at the dealer of Aуди firm.

And – spare safety locks

In – additional safety locks
(numbers 23-28)

Safety lock replacement

Before safety lock replacement, switch off all headlights, bulbs and car electric equipment, and also get a key from the lock of ignition not to damage electric equipment system.

For removal of a cover of the block of safety locks / relay, disconnect both latches outside of a cover.

See the list of safety locks to define what safety lock protects the failed chain.

Remove fused safety lock by means of a plastic clip. This clip is located on a cover of the block of safety locks / relay.

Replace fused safety lock which it is possible to determine by the fused metal strip, a safety lock of the same capacity.


Do not use a safety lock of bigger capacity as it can lead to damage of electric equipment any of elements and a fire.

If the safety lock constantly fuses, do not replace it continuously. It is necessary to find a source of an overload or short circuit. By no means it is impossible to establish a piece of a foil or a wire as it can lead to damage of electric equipment any of elements and a fire instead of a safety lock.

After safety lock replacement, establish a cover of the block of safety locks / relay into place.

Color designations

Safety locks on 5 And - brown color

Safety locks on 10 And – red color

Safety locks on 15 And – dark blue color

Safety locks on 20 And – yellow color

Safety locks on 25 And – without coloring (white)

Safety locks on 30 And – green color.

Electric chains of the hatch, window regulators and regulators of provision of sitting of the driver are protected by automatic switches which join again automatically after the reason of an overload of a chain was eliminated.

The figure on the case of a safety lock designates its capacity in Amperes.