Workshop Manuals Factory service & repair Alfa Romeo
01 General information02 Specifications03 Manufacturing data and tolerances04 Tightening torques05 Fluids and lubricants06 Maintenance07 Diagnostic checks08 Engine09 Clutch10 Gearbox and differential11 Axles and driveshafts12 Brakes13 Steering14 Suspension and wheels15 Heating, air conditioning and auxiliary units16 Electrical equipment17 Body fittings18 Body panels and frame19 Wiring diagrams and electrical functions20 Wiring harnesses21 Connectors and pin-outs22 Fault diagnosis23 Special tools
Alfa Romeo 147 Factory Service Manual (2000-2004)22 · Fault diagnosis
22 · Diagnostics

(side) brake lights not working

Make
Alfa Romeo
Model
147 Factory Service Manual
Year
2000–2004
Section
Lights › (side) brake lights not working
Fault diagnosis(side) brake lights not working

(SIDE) BRAKE LIGHTS NOT WORKING

When the brake pedal is pressed with the ignition ON, the brake lights do not work. If this fault is not signalled by the special icon in the Display module see also Table l30

Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect an Examiner to the diagnostic socket

Check that there are no faults in the Body Computer

Continue to Step 2Brake lights faulty.

Check individual lights

Continue to Step 2

2CHECKING INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition/correct rating of the individual bulbs and the bulb holder assemblyContinue to Step 3Bulbs damaged/unsuitableReplace bulbs Op. 5540A56
Bulb holder assembly faultyRepair or replace the rear lights cluster Op. 5540A56
3CHECK BRAKE LIGHTS ELECTRICAL CIRCUITAll OKProblems metOperation

Check, in order:

  • stop lights fuse
  • connection between dashboard control unit, Body Computer and brake pedal switch;
  • connections between Body Computer and bulbs: 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
4CHECK ON BRAKE PEDAL SWITCHAll OKProblems metOperation
Check that the brake pedal switch is fitted correctly and working See E2021 BRAKE LIGHTSContinue to Step 5Switch fastening / adjustment incorrectAdjust the switch
Brake pedal switch faultyReplace the switch Op. 5550D10
5CHECK ON CORRECT OPERATIONAll 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

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.