16 · Diagnostics

I55 Interior lights not working timed

Fault diagnosisI55 Interior lights not working timed

The interior timed lights can be controlled by hand but the timing function does not work or is irregular.

Step	Test procedure	Result	Action
1	CHECKING TIMED LIGHTING CIRCUIT Check, in order: services control unit supply Connections between service control unit and door contacts connections between service control unit and lights service control unit earth (Wiring diagram E2510 ROOF LAMP ).	OK	Move onto step 2
		Component defective	Replace the component involved (if a fuse is involved, search for the cause of the problem) End of diagnosis
		Connections broken	Restore connections End of diagnosis
2	SERVICES CONTROL UNIT CHECK Check that the services control unit is working properly, in particular the timed lighting function: see DESCRIPTION AND OPERATION: 5505 Instrument/guage electrical wiring (see 5505F)	OK	Move onto step 3
2		Control unit not working	Replace the services control unit Op. 5505A18 End of diagnosis
3	CORRECT OPERATION CHECK Check that the fault is no longer present	OK	End of diagnosis
3		Fault persists	Incorrect selection of diagnostic procedure

Parts & tools for this job For 1997 Alfa Romeo 156

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.