2751055 - I21 REAR FOG LAMPS NOT WORKING

When the rear fog lamp switch is operated with the dipped beam headlamps on (or front fog lamps on), the rear fog lamp does not work, and this fault is indicated by the relevant warning light.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
With the ignition ON, check that the side lights are working properly and that when they are activated the rear fog lamp can be switched on using the control panelEnd of diagnosisThe side lights are not activatedCoolant leaks detected See table   I08 
The side lights are not activatedContinue to Step 1
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner to the diagnostic socketCheck that there are no faults in the Body Computer.Check light operation while in active diagnosis modeContinue to Step 4There are faults in the Body ComputerContinue to Step 2
2CHECK ON INDIVIDUAL LIGHTAll OKProblems metOperation
Check the condition of the individual bulbs and complete bulb holder assemblyContinue to Step 3Bulb damagedChange the bulb Op. 5540A52
Bulb holder faultyRenew or replace the rear light cluster Op.   5540A44 
3CHECK ON REAR FOG LAMP ELECTRICAL CIRCUITAll OKProblems metOperation

Check, in order:

  • connections between rear fog lamp switch and Body Computer;
  • connections between Body Computer and bulbs;
  • bulb earth;
  • rear fog lamp switch earth See E2031 REAR FOG LAMPS
Continue to Step 4Connections brokenRestore the connections See E2031 REAR FOG LAMPS
Connections brokenRestore earth See E2031 REAR FOG LAMPS
4CHECK ON REAR FOG LAMP SWITCHAll OKProblems metOperation
Check rear fog lamp switch operation See E2031 REAR FOG LAMPS Continue to Step 5Rear fog lamp switch faultyReplace the rear fog lamps switch Op. 5540E18
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.