22 · Diagnostics

Dipped headlamps not working

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2004
Section: Lights › Dipped headlamps not working

‹ Prev Side lights/no. plate lights not working Next › Main beam headlamps not working

Fault diagnosisDipped headlamps not working

DIPPED HEADLAMPS NOT WORKING

When the steering column switch unit ring nut is operated with the ignition ON, the dipped headlamps do not work

The dipped headlamps do not work if the main beam headlamps and the fog lights are on at the same time

1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect the Examiner equipment to the diagnostic socket. Verify: that there are no faults in the Body Computer through the active diagnosis, the operation of the lights.	Continue to Step 3	Error – ( dipped headlamps maintenance relay at CVM)	Check dipped headlamps maintenance relay/dipped headlamps electrical circuit Continue to Step 3
		Continue to Step 3	Lights not activated	Check individual lights Continue to Step 2
2	CHECKING INDIVIDUAL LIGHTS	All OK	Problems met	Operation
	Check the condition of individual bulbs and light units.	Continue to Step 3	Bulbs damaged	Replace bulbs
			Fault in right front light cluster	Repair or replace front light cluster Op. 5540B75
			Fault in left front light cluster	Repair or replace front light cluster Op. 5540B74
3	DIPPED HEADLAMPS ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check, in order: right and left dipped headlamp fuses; dipped headlamp maintenance relay; connections between steering column switch unit and Body Computer; connections between Body Computer and dashboard control unit; connections between dashboard control unit and bulbs; bulb earths: See E2011 DIPPED HEADLAMPS	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 the connections: See E2011 DIPPED HEADLAMPS
4	CHECKING STEERING COLUMN SWITCH UNIT	All OK	Problems met	Operation
	Check that the stalk unit is working properly; in particular check the side lights switch Characteristic of working principle 5550 MANOEUVRING AND WARNING SIGNALS	Continue to Step 5	Steering column switch unit not working properly	Replace the stalk unit Op. 5550A12
5	CHECKING BODY COMPUTER	All OK	Problems met	Operation
	Check that the Body Computer is supplied properly Check that when an earth signal from stalk unit to Body is activated, an earth signal is emitted from the Body to drive the dipped beam headlamps relay: See E2011 DIPPED HEADLAMPS	Continue to Step 6	Body Computer supply incorrect	Restore the correct supply See E2011 DIPPED HEADLAMPS
		Continue to Step 6	Body Computer faulty	Replace the Body Computer Op. 5505A32
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 Side lights/no. plate lights not working Next › Main beam headlamps not working

Parts & tools for this job For 2000 Alfa Romeo 147

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