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Fiat Seicento Factory Service Manual (1998-2010)12 · Diagnosis
12 · Diagnostics

Diagnosis table

Make
Fiat
Model
Seicento Factory Service Manual
Year
1998–2010
Section
Lights › Diagnosis table
DiagnosisDiagnosis table

Diagnosis table

I15 Brake lights (side) do not work

Pressing the brake pedal, with the key in MAR, the brake lights do not work

Step Validity Operation to be performed Test results
OK ⚠ 🔧
1 CHECK SINGLE LIGHTS All OK
Go to Step 2		 Problems found Intervention
Check that the single bulbs and the bulb holders are intact Bulbs damaged Replace bulbs
Faulty bulb holder Restore or replace rear light cluster
PROCEDURE OP. 5540A44
2 CHECK BRAKE LIGHT ELECTRIC CIRCUIT All OK
Go to Step 3		 Problems found Intervention
Check in sequence:
– brake light fuse (F21)
– connections between junction unit and brake pedal switch
– connections between brake pedal switch and bulbs
– bulb earth
(Wiring diagram E2021 “Brake lights”)		 Faulty component Replace component (if it is a fuse investigate the cause that may have triggered it)
Connections cut off Restore connections
3 CHECK BRAKE PEDAL SWITCH All OK
Go to Step 4		 Problems found Intervention
Check correct fastening and operation of brake pedal switch (Wiring diagram E2021 “Brake lights”) Faulty brake pedal switch Restore or replace brake pedal switch
PROCEDURE 5550D10
4 CHECK CORRECT OPERATION All OK
End of test		 Problems found
–		 Intervention
–

Parts & tools for this job For 1998 Fiat Seicento

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