12 · Diagnostics

I05 Dipped headlights do not work

DiagnosisI05 Dipped headlights do not work

Diagnosis table

When the key is at MAR operating the knurled ring of the steering column lever unit the dipped headlights do not work

Step	Validity Operation to be performed	Test results
Step	Validity Operation to be performed	OK	⚠	🔧
1	CHECK SINGLE LIGHTS	All OK	Problems found	Intervention
	Check that single bulbs and respective light cluster are intact	Go to Step 2	Bulbs damaged	Replace bulbs
		Faulty light cluster	Restore or replace front light cluster PROCEDURE OP. 5540B10
2		CHECK DIPPED HEADLIGHT ELECTRIC CIRCUIT	All OK	Problems found	Intervention
	Check in sequence: – dipped headlight fuse, right(F7) and left (F6) – connections between steering column lever unit, and junction unit – connections between junction unit and bulbs – bulb earth (Wiring diagram E2011 “Dipped headlights”)	Go to Step 3	Faulty component	Replace the component (if it is a fuse investigate the cause that may have triggered it)
		Connections cut off	Restore connections

3		CHECK STEERING COLUMN LEVER UNIT	All OK	Problems found	Intervention
		Check correct operation of steering column lever unit (in particular, the light switch): DESCRIPTION AND OPERATION 5550A	Go to Step 4	Steering column lever unit does not work correctly	Replace steering column lever unit PROCEDURE OP. 5550A10 (PROCEDURE OP. 5550A12 versions with airbag)

4	CHECK CORRECT OPERATION		All OK	Problems found	Intervention
4	Check the fault is no longer present	End of test	–	–

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