K90 INSTRUMENT LIGHTS / NOT WORKING - Alfa - 156 - eLearn

With the key turned on and the side lights on, the instruments do not light up

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check operation of the lighting dimmer	Continue to Step 1	The instruments are properly lit, but the intensity is not adjustable	See table K91
1	CHECKING BULBS	All OK	Problems met	Operation
	Check the condition of individual light bulbs on the various instruments.	Continue to Step 2	Rev counter and speedometer bulbs faulty	Change the relevant warning light: Op. 5560B06
			Check control bulbs faulty	Replace the relevant warning light Op. 5560C60
			Central instrument bulb faulty	Change the relevant warning light: Op. 5560C51
2	INSTRUMENT SUPPLY CIRCUIT CHECK	All OK	Problems met	Operation
	Check, in order: ignition-operated service fuse instrument power supply ( See E2530 INSTRUMENT LIGHTING ).	Continue to Step 3	Component defective	Replace the component involved (if a fuse is involved, search for the cause of the problem)
		Continue to Step 3	Connections broken	Restore the connections (
3	CHECK CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'