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Alfa Romeo 147 Factory Service Manual (2000-2004)22 · Fault diagnosis
22 · Diagnostics

Centre brake light ("third brake light") not working

Make
Alfa Romeo
Model
147 Factory Service Manual
Year
2000–2004
Section
Lights › Centre brake light ("third brake light") not working
Fault diagnosisCentre brake light ("third brake light") not working

CENTRE BRAKE LIGHT ("THIRD BRAKE LIGHT") NOT WORKING

When the brake pedal is pressed, with the ignition on, the centre brake light ('third brake light') does not work. If the side stop lights are not working either See table I15 (SIDE) BRAKE LIGHTS NOT WORKING

Results of the tests
1CHECK INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition of the individual bulbs and complete bulb holder assemblyContinue to Step 2Bulbs damagedReplace bulbs Op. 5550D16
Bulb holder assembly faultyRepair or change the third brake light Op. 5550D16
2BRAKE LIGHTS SWITCH CHECKAll OKProblems metOperation
Check that the brake light switch is correctly fastened and working properlyContinue to Step 3Brake light switch faultyRenew or replace the brake light switch Op. 5550D10
3CHECK BRAKE LIGHTS ELECTRICAL CIRCUITAll OKProblems metOperation

Check, in order:

  • brake lights fuse (services)
  • connections between DASHBOARD control unit and brake pedal switch;
  • connections between DASHBOARD control unit and bulb;
  • bulb earth

See E2021 BRAKE LIGHTS

Continue to Step 4Component defectiveReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections: See E2021 BRAKE LIGHTS
Faulty earthRestore the earth contact: See E2021 BRAKE LIGHTS
4CORRECT OPERATION CHECKAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'

Parts & tools for this job For 2000 Alfa Romeo 147

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