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Alfa Romeo 147 Factory Service Manual (2000-2002)18 · Fault diagnosis
18 · Diagnostics

I16 Centre stop light (third stop) not working

Make
Alfa Romeo
Model
147 Factory Service Manual
Year
2000–2002
Section
Lights › I16 Centre stop light (third stop) not working
Fault diagnosisI16 Centre stop light (third stop) not working

I16 Centre stop light (third stop) 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

StepTest procedureResultAction
1CHECK INDIVIDUAL LIGHTS

Check the condition of the individual bulbs and complete bulb holder assembly

OK

Move onto step 2

Bulbs damaged

End of diagnosis

Bulb holder assembly faulty

End of diagnosis

2BRAKE LIGHTS SWITCH CHECK

Check that the brake light switch is correctly fastened and working properly

OK

Move onto step 3

Brake light switch faulty

End of diagnosis

3CHECK BRAKE LIGHTS ELECTRICAL CIRCUIT

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

Wiring diagram E2021 STOP LIGHT

OK

Move onto step 4

Component defective
  • Replace the component involved (if a fuse is involved, search for the cause of the problem)

End of diagnosis

Connections broken

End of diagnosis

Faulty earth

End of diagnosis

4CORRECT OPERATION CHECK

Check that the fault is no longer present

OK

Incorrect selection of diagnostic procedure

Fault persists

Incorrect selection of diagnostic procedure

Parts & tools for this job For 2000 Alfa Romeo 147

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