22 · Diagnostics

Fog lamp (one) not working

Fault diagnosisFog lamp (one) not working

FOG LAMP (ONE) NOT WORKING

When the fog lights switch is operated with the side lights on, one of the fog lights does not work.

The fog lights are controlled by the Body Computer Node via a relay in the Engine Bay Control Unit

1	CHECK ON INDIVIDUAL LIGHTS	All OK	Problems met	Operation
		Results of the tests
	Check the condition of individual bulbs and lamps	Continue to Step 2	Bulbs damaged	Replace bulbs
			Right front fog light faulty	Repair or replace the right front fog light
			Left front fog light faulty	Repair or replace the left front fog light
2	CHECK FOG LAMP ELECTRIC CIRCUIT	All OK	Problems met	Operation
	Check, in order: fog light fuse; Connections between body computer and engine bay control unit connections between engine bay control unit and bulbs; bulb earth: See E2030 FOG LIGHTS	Continue to Step 3	Defective component	Replace the component involved (if a fuse is involved, search for the cause of the problem)
			Defective component	Restore the connections
			Defective component	Restore the earth to the bulbs: See E2030 FOG LIGHTS
3	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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