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Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Centre brake light (third brake light) not working

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
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

1.2 8v, 1.3 Multijet, 1.4 16v

N.B. The third brake light is activated directly by the brake switch

Test results
1ELECTRICAL SYSTEM CHECKAll OKProblems encounteredOperation

Check the third brake light earth is efficient

See E2021 BRAKE LIGHTS

Check the conditino of the third brake light bulb

Move on to Step 2

1. Earth inefficient

2.Bulb burnt out

1. Restore correct earth.

2. Replace the bulb

Op. 5550D17 THIRD BRAKE LIGHT BULB(S) - R.R

2ELECTRICAL SYSTEM CHECKAll OKProblems encounteredOperation

Check the continuity of the connection between the third brake light and the switch

See E2021 BRAKE LIGHTS

Move on to Step 3Connection brokenRestore the correct electrical connection.
3CHECK ON CONNECTION AT THIRD BRAKE LIGHTAll OKProblems encounteredOperation
Check that the cables are correctly positioned in the connectorMove on to Step 4Cables incorrectly positionedFit the cables in the correct position
4CORRECT OPERATION CHECKAll OKProblems encounteredOperation
Check that the third brake light comes onEnd of diagnosisDoes not come on

Replace the third brake light

Op. 5550D16 THIRD BRAKE LIGHT - R+R

Parts & tools for this job For 2007 Fiat 500

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