| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS |
|---|
| 1 | INDIVIDUAL LIGHT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the condition of the bulbs and associated bulb holder; | Move on to Step | 1. Bulbs 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 |
| 2. Tail-light cluster fault | 2. Replace or change the tail-light cluster Op. 5540A44 L/H OR R/H TAIL LIGHT (ONE) - R+R |
| 2 | REAR FOG LIGHT ELECTRICAL CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the following, in order:- Connections between battery, ignition switch, facia control unit, switch control unit;
- Connections between stalk unit and switch control unit;
- Connections between switch control unit and bulbs;
- Stalk unit earth;
- Bulb earth
| Move on to Step | 1. Component defective | 1. Replace defective component (in the case of a fuse, find out what caused it to blow). |
| 2. Connections interrupted | 2. Repair the connections See E2031 REAR FOG LAMPS |
| 3 | STEERING COLUMN SWITCH UNIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that an earth signal output is generated to the switch control unit when the stalk switch wheel is turned to dipped/main beam See E2031 REAR FOG LAMPS | Move on to Step | Stalk unit not working properly | Replace the steering column switch unit Op. 5550A12 COMPLETE STALK UNIT - R+R FOR VERSIONS WITH AIR BAG |
| 4 | SWITCH CONTROL UNIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the following, in order:- Correct power supply to switch control unit
- Check that an battery voltage output is generated to control the rear fog light bulbs when the rear fog light button is activated
| Move on to Step | 1. Power supply incorrect | 1. Switch control unit fault |
| 2. Restore correct power supply See E2031 REAR FOG LAMPS | 2. Change switch control unit |
| 5 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | | | |