Checking The Tail Lamps

Checking the tail lamps

Checking wiring and components




- Ignition off.
Check that fuse 23 the integrated relay / fusebox in the engine compartment is intact.
Check that the bulbs for the tail lamps are intact.
Check the cable between control module connector F #8 (#B8) and fuse 23 and the cable between control module connector B1 #2 (#A32) and left and right tail lamps #2.3 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault , contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault and for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the ground cables from each tail lamp for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault , contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between control module connector B1 #2 (#A32) and left and right tail lamps #2.3, rear side marker lamps #1 and the license plate lighting for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between control module connector F #2 (#B2) and front side marker lamps #1, lighting switch #1, beam height adjustment for the left and right headlamp #3 and the engine control module (ECM) for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.

Other information
- To connect the breakout box, see Connecting the breakout box Connecting The Breakout Box. Central Electronic Module (CEM).
- For information about signals, see Signal specification Signal Description. Central Electronic Module (CEM).













Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Activate the tail lamp. The tail lamp must both light and go out.





Does the tail lamp light and go out?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking wiring and components

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