Fault diagnosis

I27 REAR FOG LAMP (ONE) NOT WORKING

Engines: 2.0 16V, 2.0 JTD 8V, 2.3 JTD 16V, 2.8 JTD 8V

Engines: 2.0 16V
Equipment / version codes: Minibus [B33], Van [B34], Panorama [B36], Combi [B37]

One rear foglamp does not work when the stalk switch wheel is turned with the key ON.

Engines: 2.0 16V
Equipment / version codes: Minibus [B33], Van [B34], Panorama [B36], Combi [B37]

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	INDIVIDUAL LIGHT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the bulb and associated bulb holder;	Move on to Step	1. Bulb damaged	1. Change the bulbs Op. 5540A74 BULB OF A SIDELIGHT OR FOG LAMP OR REVERSING LIGHT IN A TAIL-LIGHT, LH OR RH R R
	Check the condition of the bulb and associated bulb holder;	Move on to Step	2. Light cluster fault	2. Repair or replace front light cluster Op. 5540A44 L/H OR R/H TAIL LIGHT (ONE) - R+R
2	REAR FOGLAMP ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following, in order: Connections between switch control unit and bulbs; Bulb earth	Move on to Step	Connections interrupted	Repair the connections See E2031 REAR FOG LAMPS
3	SWITCH CONTROL UNIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following, in order: Correct power supply to switch control unit Check that a battery voltage output is generated to control the rear fog lamp bulbs when the rear fog lamp button is activated	Move on to Step	1. Power supply incorrect	1. Restore correct power supply See E2031 REAR FOG LAMPS
		Move on to Step	2. Switch control unit fault	2. Replace switch control unit
4	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present