2582408 - 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
1CHECK INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition of individual bulbs and light units.Continue to Step 2Left bulb damagedReplace the bulb Op.   5540B22 
Right bulb damagedReplace the bulb Op.   5540B22 
Light unit faultyRepair or change the front light unit Op.   5540B79 
2DIPPED 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-Body Computer and junction unit;
  • connections between junction unit and bulbs
  • bulb earth See   E2011  DIPPED HEADLAMPS
Continue to Step 3Component defectiveReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore connections See   E2011  DIPPED HEADLAMPS
3STEERING COLUMN SWITCH UNIT CHECKAll OKProblems metOperation
Check that the stalk unit is working properly; in particular check the side lights switch Characteristic of working principle 5550A stalk unitContinue to Step 4Steering column switch unit not working properlyReplace the steering column switch unit Op.   5550A12 
4CHECK 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 5Body Computer supply incorrectRestore the correct supply See   E2011  DIPPED HEADLAMPS
Body Computer faultyReplace the Body Computer Op.   5505A32 
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'