Checking the Rear Fog Lamp (Trailers)

Checking the rear fog lamp (trailers)

Checking the market
The following fault-tracing applies ONLY to cars with trailer connectors.

Is the test applicable?

Yes - Checking the relay

No - No Fault Found

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Checking the relay
Check the function of relay 2/83: Activate and deactivate the relay a number of times. The relay is functioning if there is a clicking sound when the relay is activated and deactivated.
Replace with a new relay if the relay does not function.

Other information:
- To access and replace the integrated relay/fusebox in the cargo compartment, see Integrated relay/fuse box cargo compartment/rear electronic module, replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.









Was a fault detected?

Yes - Fault Found

No - Checking components and wiring

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Checking components and wiring
Check that fuse 11D/2 is intact.
Check the cable between relay 2/83 terminal #3 and the trailer connector. Check for an open-circuit. Check for a short-circuit to ground.
Check the cable between the trailer connector and the ground terminal for an open-circuit.
Remedy as necessary.

Other information:
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters
- To connect the breakout box, see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM)
- To access the integrated relay / fusebox in the cargo compartment, see Integrated relay/fuse box cargo compartment/rear electronic module, replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.













Was a fault detected?

Yes - Fault Found

No - No Fault Found

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