Direction indicators / hazard warning lights / not working

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2004
Section: Lights › Direction indicators / hazard warning lights / not working

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Fault diagnosisDirection indicators / hazard warning lights / not working

DIRECTION INDICATORS / HAZARD WARNING LIGHTS / NOT WORKING

With the ignition ON, when the steering column switch unit lever is raised or lowered, the direction indicators do not work. When the button is pressed, the hazard warning lights do not work

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	Direction indicators error. Individual bulb not working (not all)	Check individual lights. Continue to Step 2
		Continue to Step 3	All the bulbs are not working	Check lights electric circuit. Continue to Step 5
2	CHECKING INDIVIDUAL LIGHTS	All OK	Problems met	Operation
	Check the condition of the individual bulbs and the bulb holder assembly	Continue to Step 3	Front bulb damaged	Change the bulb Op. 5550C30
			Damaged rear bulb	Change the bulb Op. 5540A56
			Side repeater damaged	Replace the side repeater Op. 5550C22
			Rear bulb holder assembly faulty	Replace the bulb holder assembly Op. 5550C30
			Front bulb holder assembly faulty	Replace the bulb holder assembly Op. 5540A56
3	CHECKING STEERING COLUMN SWITCH UNIT	All OK	Problems met	Operation
	Check that the steering column switch unit is working properly and check that the direction indicators switch is working properly Characteristic of working principle 5550 MANOEUVRING AND WARNING SIGNALS	Continue to Step 4	Steering column switch unit not working properly	Replace the stalk unit Op. 5550A12
4	CHECK HAZARD WARNING LIGHTS SWITCH	All OK	Problems met	Operation
	Check the operation of the hazard warning lights switch: See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS	Continue to Step 5	Hazard warning lights switch faulty	Replace hazard warning lights switch Op. 5505A24
5	CHECK DIRECTION INDICATORS/HAZARD LIGHTS ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check, in order: connections between stalk unit and Body Computer connections between CENTRE CONTROL PANEL and Body Computer; connections between Body Computer and bulbs; earth and condition of bulbs: See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS	Continue to Step 6	Component defective	Replace the component involved (if a fuse is involved, search for the cause of the problem)
		Continue to Step 6	Connections broken	Restore the connections: See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
6	CHECK ON BODY COMPUTER SUPPLY	All OK	Problems met	Operation
	Check that the Body Computer is supplied correctly	Continue to Step 7	Incorrect supply	Restore the correct supply See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
	Check that the Body Computer is supplied correctly	Continue to Step 7	Body Computer faulty	Replace the Body Computer Op. 5505A32
7	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'

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Parts & tools for this job For 2000 Alfa Romeo 147

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