2427517 - 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. If the rear fog lamp does not work and the Instrument panel Node does not signal this, also see Table I30 LIGHTS NOT WORKING CHECK. If the dipped beam headlamps do not work either, first see Table I05
Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner to the diagnostic socketCheck that there are no faults in the Body ComputerCheck light operation while in active diagnosis modeContinue to Step 2Rear fog lamp errorRear fog lamp does not activateContinue to Step 2
2CHECK ON INDIVIDUAL LIGHTAll OKProblems metOperation
Check the condition of the bulb and the bulb holder assemblyContinue to Step 3Bulb damagedChange bulb
Bulb damagedRenew or replace the rear light cluster
3CHECK ON REAR FOG LAMP ELECTRICAL CIRCUITAll OKProblems metOperation

Check, in order:

  • connections between centre control panel and Body Computer;
  • connections between Body Computer and rear fog lamp bulb
  • bulb earth
  • centre control panel earth: See   E2031  REAR FOG LAMPS
Continue to Step 4Connections brokenRestore the connections: See   E2031  REAR FOG LAMPS
Connections brokenRenew the earth : See   E2031  REAR FOG LAMPS
4REAR FOG LAMP SWITCH CHECKAll OKProblems metOperation
Check the operation of the rear fog lamp switch in the centre control panel: See   E2031  REAR FOG LAMPS Continue to Step 5Rear fog lamp switch faultyReplace the centre control panel
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer present End of diagnosis