358454 - I24 MAIN BEAM HEADLAMPS DO NOT COME ON - WITH STEERING COLUMN SWITCH UNIT LEVER IN MAIN BEAM POSITION

The main beam headlamps do not work via the steering column switch unit stable control, whilst the flasher works properly;

The main beam headlamps are controlled by the Body Computer Node via a relay located in the Engine Compartment Junction Unit. The main beam headlamp consists of a traditional bulb (known as the "auxiliary headlamp") and an electronic module connected in parallel to the bulb which supplies a coil which activates a partition which fully releases the xenon dipped headlamp.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	STEERING COLUMN SWITCH UNIT OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the operation of the steering column switch unit in the main beam headlamps position (Wiring Diagram ) E2012 MAIN BEAMS	Move on to Step	open circuit for steering column switch unit internal line	Replace the steering column switch unit    See in Op. 5550A12 complete stalk unit - r+r for versions with air bag
2	ELECTRICAL SYSTEM CHECK.	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the continuity of the connections between the steering column switch unit and the Exterior Lights Control (Wiring Diagram ) E2012 MAIN BEAMS	Move on to Step	Interruption or no insulation for the connecting cables	Restore the electrical connection (Wiring Diagram ) E2012 MAIN BEAMS
3	EXTERIOR LIGHTS CONTROL OPERATION CHECK.	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the continuity of the connection to earth for the exterior lights control with the dipped headlamps position switched on     Continue following the instructions in the test 5540AA Exterior lights control operational check (C.L.E.)	Move on to Step	Exterior lights internal control interrupted	Replace the exterior lights control    See in Op. 5540A20 Exterior lights SWITCH PANEL and instrument panel light dimmer - R.R.
4	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present