22 · Diagnostics

Main beam headlamps do not come on

Make: Fiat
Model: Grande Punto Factory Service Manual
Year: 2005–2012
Section: Lights › Main beam headlamps do not come on

‹ Prev High beam (one) rh or lh does not come on or comes on irregularly Next › Fog light (one) not working

Fault diagnosisMain beam headlamps do not come on

MAIN BEAM HEADLAMPS DO NOT COME ON

The main beam headlamps are controlled by the Body Computer Node via a relay located in the Engine Compartment Junction Unit.

1	ELECTRICAL SYSTEM CHECK	All OK	Problems encountered	Operation
		Test results
	Check the condition of the protective fuse in the engine compartment junction unit. See E2012 MAIN BEAM HEADLAMPS	Move on to Step 2	Fuses blown	Check the wiring insulation by continuing to step 3, then replace the fuses See E2012 MAIN BEAM HEADLAMPS
2	BULB CONDITION CHECK	All OK	Problems encountered	Operation
	Check the condition of the high beam bulbs	Move on to Step 3	Bulbs burnt out	Replace the bulbs Op. 5540B24 MAIN BEAM BULB (ONE) FOR ONE HEADLAMP/LIGHT CLUSTER LH OR RH - R.R
3	ELECTRICAL SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the continuity and the insulation of the wiring between the front lamp and the Engine Compartment Control Unit See E2012 MAIN BEAM HEADLAMPS	Move on to Step 4	Electrical connections broken or lacking insulation	Renew the electrical connections See E2012 MAIN BEAM HEADLAMPS
4	ELECTRICAL SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the continuity and the insulation of the wiring between the outlet connector for the Engine Compartment Control Unit and the Protective Fuse See E2012 MAIN BEAM HEADLAMPS	Move on to Step 5	Interruption or no insulation for the Dashboard Junction Unit internal connection	Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
5	LIGHT CLUSTER ELECRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the wiring inside the light cluster between the headlamp connector and the high beam bulb	Move on to Step 6	Internal wires broken or not insulated	Restore the electrical connection, if necessary, replace the front light cluster Op. 5540B07 LEFT FRONT HEADLAMP - R.R and/or Op. 5540B08 RIGHT FRONT HEADLAMP - R.R
6	LIGHTING STALK CHECK	All OK	Problems encountered	Operation
	Connect an Examiner to the Body Computer node to check the correct operation of the light stalk contacts on the high beam position	Move on to Step 7	Light stalk defective	Replace the stalk Op. 5550A10 STALK UNIT ASSEMBLY - R+R
7	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace body computer Op. 5505A32 BODY COMPUTER - R.R

‹ Prev High beam (one) rh or lh does not come on or comes on irregularly Next › Fog light (one) not working

Parts & tools for this job For 2005 Fiat Grande Punto

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