2398777 - 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 dipped headlamps are working properly and that when they are activated the rear fog lamp can be switched on using the control panelEnd of diagnosisThe dipped headlamps are not activatedContinue according to the instructions for the See table   I05  DIPPED HEADLAMPS NOT WORKING
The reversing light is not activatedContinue to Step 1
Daylight sensorWith the ignition ON, check that the dipped headlamps are working properly and that when they are activated the rear fog lamp can be switched on using the control panelEnd of diagnosisThe dipped headlamps are not activatedContinue according to the instructions for the See table   I22  DIPPED BEAMS DO NOT COME ON IN "MANUAL" DIPPED MODE
The reversing light is 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 the bulb holder assembliesContinue to Step 3Bulb damagedChange the bulb Op.   5540A50 
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
Faulty earthRestore 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 control panel Op.   7040A56 
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.