22 · Diagnostics

Main beam headlamps not working

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Lights › Main beam headlamps not working

‹ Prev Dipped headlamps not working Next › Dipped beam (one) rh or lh not working

Fault diagnosisMain beam headlamps not working

MAIN BEAM HEADLAMPS NOT WORKING

1.2 8v, 1.3 Multijet, 1.4 16v

The main beam headlamps do not work under any conditions (either in the stable lever position or flasher position);

N.B: The main beam headlights are controlled by the Body Computer Node via a relay located in the Engine Compartment Control Unit; the lights can be switched on/off using the following controls:

1. Command from stalk in fixed position

2. Command from the stalk in Flasher function unstable position.

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
		Test results
	Connect the Examiner diagnostic equipment to the diagnostic socket and check for the presence of errors in the Body Computer Node.	Move on to Step 2	Errors present in the Body Computer Node.	Continue following the instructions given by the diagnostic equipment.
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Keeping the diagnostic equipment connected, check in active diagnosis that the main beam headlamps are working properly.	Move on to Step 6	Main beam headlamps not working	Move on to Step 3
3	BULB OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the main beam headlamp bulbs are working properly	Move on to Step 4	Bulb filament broken.	Replace the bulbs Op. 5540B24 MAIN BEAM BULB (ONE) FOR ONE HEADLAMP/LIGHT CLUSTER LH OR RH - R.R
4	ELECTRICAL SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the continuity of the connections between the steering column switch unit and the Body Computer Node. See E2012 MAIN BEAM HEADLAMPS Check the continuity of the connections between the Body Computer Node and the engine compartment control unit See E2012 MAIN BEAM HEADLAMPS Check the continuity of the connections between the engine compartment control unit and main beam bulbs. See E2012 MAIN BEAM HEADLAMPS Check the main beam control relay is working properly See E2012 MAIN BEAM HEADLAMPS	Move on to Step 5	1. Wiring broken 2. Relay defective	1. Restore the correct electrical connection 2. Replace the relay
5	MAIN BEAM HEADLAMP CONTROL OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the steering wheel interface is working properly	Move on to Step 6	Steering wheel interface internal break	Replace the steering column switch unit Op. 5550A10 STALK UNIT ASSEMBLY - R+R
6	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the body computer is working properly.	End of diagnosis	Body Computer not working properly.	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R

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Parts & tools for this job For 2007 Fiat 500

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