2751050 - I10 DIRECTION INDICATORS / HAZARD WARNING LIGHTS / NOT WORKING

With the ignition ON, when the steering column switch unit lever is raised or lowered, the direction indicators do not work. The hazard warning lights do not work when the button is pressed
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Press the hazard warning lights switch in the control panel and check that the direction indicators/hazard warning lights are activated and deactivated With the ignition ON, using the special lever, check that the left/right direction indicators are activatedEnd of diagnosisHazard warning lights faultyContinue as instructed See table   I39 
Hazard warning lights faultyContinue to Step 1
Hazard warning lights faultyContinue as instructed See table   I12 
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 4the operation of the lights in active diagnosis.Continue according to the diagnostic equipment instructions
Some of the bulbs do not come onContinue to Step 3
None of the bulbs manages to come onContinue to Step 2
2DIRECTION INDICATORS ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • connections between steering column switch unit and Body Computer;
  • connections between Body Computer and bulbs
  • bulb earth See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
Continue to Step 3Defective componentReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
3CHECK ON INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition of the individual defective bulbs and the bulb holder assembly Continue to Step 4Front bulb damagedChange the bulb Op. 5550C18
Front bulb damagedChange the bulb Op. 5550C26
Front bulb damagedReplace the side repeater Op.   5550C22 
Front bulb damagedReplace the bulb holder assembly Op.   5540A44 
Front bulb damagedReplace the bulb holder assembly Op. 5540B70
Front bulb damagedReplace the bulb holder assembly Op. 5540B71
4CHECK ON STEERING COLUMN SWITCH UNITAll OKProblems metOperation
Check that the steering column switch unit is working properly and check that the direction indicators switch is working properlyContinue to Step 5Stalk unit not working properlyReplace the stalk unit Op. 5550A12
5CHECK ON BODY COMPUTER SUPPLYAll OKProblems metOperation
Check that the Body Computer is supplied correctlyContinue to Step 6Incorrect supplyRestore the correct supply See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
Incorrect supplyReplace the Body Computer Op.   5505A32 
6Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.