22 · Diagnostics

Fog lights not working

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: Lights › Fog lights not working

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Fault diagnosisFog lights not working

FOG LIGHTS NOT WORKING

When the front fog lamps switch is operated with the side lights on, the front fog lamps do not work.

The front fog lamps are not enabled with the main beam headlamps on

1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no errors in the Body Computer	Continue to Step 2	Fog lights relay short-circuiting to battery	Restore the correct connection See E2030 FOG LIGHTS
2	CHECK INDIVIDUAL LIGHTS	All OK	Problems met	Operation
	Check the condition/insulation of the individual bulbs and lamps	Continue to Step 3	Left bulb damaged	Replace the bulb Op. 5540B22
			Right bulb damaged	Replace the bulb Op. 5540B22
			Lamps faulty	Repair or change the front light unit Op. 5540B79
3	CHECK FOG LAMP ELECTRIC CIRCUIT	All OK	Problems met	Operation
	Check, in order: front fog lamp fuse; fog lights relay; engine compartment control unit supply; connections between Body Computer and engine compartment control unit; connections between engine compartment control unit and bulbs; connections between Body Computer and fog lights switch; bulb earth: See E2030 FOG LIGHTS	Continue to Step 4	Component defective	Replace the component involved (if a fuse is involved, search for the cause of the problem)
		Continue to Step 4	Connections broken	Restore connections See E2030 FOG LIGHTS
4	CHECK ON BODY COMPUTER	All OK	Problems met	Operation
	Check that the Body Computer is working properly, in particular the front fog lamps control function	Continue to Step 5	Device not working	Replace the Body Computer Op. 5505A32
5	CHECK FOG LAMP SWITCH	All OK	Problems met	Operation
	Check the operation of the fog lights switch See E2030 FOG LIGHTS	Continue to Step 6	Fog lights switch faulty	Replace the control panel Op. 5505A24
6	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'

‹ Prev Reversing lights not working Next › Rear fog lamps not working

Parts & tools for this job For 2000 Fiat Doblò

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