| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS |
|---|
| 1 | INDIVIDUAL BULB 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 bulbs |
| 2. Light cluster fault | 2. Replace or change the light cluster |
| 2 | TURN SIGNAL ELECTRICAL CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the following, in order:- Turn signal fuses;
- Connections between battery and underfacia junction unit
- Connections between battery, ignition switch and underfacia junction unit
- Connections between underfacia junction unit and 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 E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS |
| 3 | STEERING COLUMN SWITCH UNIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that an earth signal is present to the switch control unit when the stalk unit turn stalk switch is operated See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS | 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 |
|---|
| Check the following, in order:- Correct power supplies/earths to switch control unit
- Check that when an earth signal is activated from the stalk unit to the switch control unit, a battery voltage leaves the switch control unit to turn on the bulbs
| Move on to Step | 1. Power supplies/earths incorrect | 1. Restore correct power supplies/earths See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS |
| 2. Switch control unit fault | 2. Replace switch control unit Op. 5505A24 W/L AND SERVICE SWITCH MOUNT - R+R |
| 5 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | | | |