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Fiat Grande Punto Factory Service Manual (2005-2012)22 · Fault diagnosis
22 · Diagnostics

Brake lights and third brake light not working

Make
Fiat
Model
Grande Punto Factory Service Manual
Year
2005–2012
Section
Lights › Brake lights and third brake light not working
Fault diagnosisBrake lights and third brake light not working

BRAKE LIGHTS AND THIRD BRAKE LIGHT NOT WORKING

The side brake lights and the third brake light are activated by the Body Computer Node controlled by the brake light switch.

Test results
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation

Connect an Examiner tester and ensure that the following errors are not present in the Body Computer node:

- error B1010;

- error B1011;

- error B1026;

- error B1028

Move on to Step 2

1. Presence of error B1010

2. Presence of error B1011

3. Presence of error B1026

4. Presence of error B1028

1. Replace brake light switch faulty

Op. 5550D10 BRAKE LIGHT SWITCH - R+R

2. Move on to Step 3

3. Move on to Step 3

4. Move on to Step 2

2BRAKE LIGHT OPERATION CHECK.All OKProblems encounteredOperation
Keep the diagnostic tester connected and check that the brake lights are operating correctly in active diagnosis modeMove on to Step 3

1. Bulbs operating

2. Bulbs not operating

1. Replace Body Computer

Op. 5505A32 BODY COMPUTER - R.R

2. Replace the bulb or the associated wiring

3ELECTRICAL SYSTEM CHECKAll OKProblems encounteredOperation

Check the continuity of the bulb wiring

See E2021 BRAKE LIGHTS

Move on to Step 4Wiring brokenRestore correct wiring
4CONTROL SWITCH CHECKAll OKProblems encounteredOperation

Check that the brake switch is working properly

See Test 5550DA BRAKE PEDAL SWITCH OPERATION CHECK

Move on to Step 5Switch broken

Replace brake light switch faulty

Op. 5550D10 BRAKE LIGHT SWITCH - R+R

5BODY COMPUTER CONNECTION CHECKAll OKProblems encounteredOperation
Check for deformed terminals or connections not present on the Body ComputerEnd of diagnosisMissing connections/pins bentRenew the correct connections

Parts & tools for this job For 2005 Fiat Grande Punto

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