2751047 - I05 DIPPED HEADLAMPS NOT WORKING

When the steering column switch unit ring nut is operated with the ignition ON, the dipped headlamps do not work
Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner to the diagnostic socket

check

  • that there are no faults in the Body Computer
  • the operation of the lights in active diagnosis.
Continue to Step 3the operation of the lights in active diagnosis.Continue according to the instructions for the diagnostic equipment
the operation of the lights in active diagnosis.Continue to Step 2
2CHECK ON INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition of individual bulbs and light units.Continue to Step 3Bulbs damagedReplace bulbs Op.   5540B22 
Front right light cluster faultyRepair or replace front lights cluster Op. 5540B08
Front left light cluster faultyRepair or replace front lights cluster Op. 5540B07
3DIPPED HEADLAMPS ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • right and left dipped headlamp fuses;
  • dipped headlamp maintenance relay;
  • connections between steering column switch unit and Body Computer;
  • connections between Body Computer and dashboard control unit;
  • connections between dashboard control unit and bulbs;
  • bulb earth See E2011 DIPPED HEADLAMPS
Continue to Step 4Connections brokenReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections See E2011 DIPPED HEADLAMPS
4CHECK ON STEERING COLUMN SWITCH UNITAll OKProblems metOperation
Check that the stalk unit is working properly; in particular check the side lights switchContinue to Step 5Stalk unit not working properlyReplace the stalk unit Op. 5550A12
5CHECK ON BODY COMPUTERAll OKProblems metOperation
Check that the Body Computer is supplied properlyCheck that when an earth signal from stalk unit to Body is activated, an earth signal is emitted from the Body to drive the dipped beam headlamps relay: See E2011 DIPPED HEADLAMPS Continue to Step 6Body Computer supply incorrectRestore the correct supply See E2011 DIPPED HEADLAMPS
Body Computer supply incorrectReplace the Body Computer Op.   5505A32 
6Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.