| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS |
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| 0 | PRELIMINARY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check fuse condition See E3020 WINDSCREEN WASH/WIPE | Move on to Step | Fuse/s blown | Replace fuse/s and find out what could have caused them to blow |
| 1 | WINDSCREEN WASH/WIPE ELECTRIC CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the following, in order:- Connections between battery and engine bay junction unit
- Connections between engine bay junction unit and underfacia junction unit
- Connections between battery, ignition switch and underfacia junction unit
- Connections between underfacia junction unit and steering column switch unit
- Connections between underfacia junction unit and windscreen wiper motor
- Connections between engine compartment junction unit and windscreen wiper motor
- Connections between steering column switch unit and windscreen wiper motor
- Connections between steering column switch unit and electric pump motor
- Stalk unit earth
- Windscreen wiper motor earth
| Move on to Step | Connections interrupted | Repair the connections See E3022 HEADLAMP WASHER |
| 2 | STEERING COLUMN SWITCH UNIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| - Correct stalk unit power supply/earths
- Check there is an earth signal output to the windscreen wiper motor when the steering column switch unit lever is operated
| Move on to Step | 1. Power supplies/earths incorrect | 1. Restore correct power supplies/earths See E3022 HEADLAMP WASHER |
| 2. Stalk unit not working properly | 2. Replace the steering column switch unit Op. 5550A12 COMPLETE STALK UNIT - R+R FOR VERSIONS WITH AIR BAG |
| 3 | WINDSCREEN WIPER MOTOR CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the following, in order: See E3022 HEADLAMP WASHER- Correct windscreen wiper motor power supply/earths;
- Check that when there is an earth signal from the steering column switch unit to the windscreen wiper motor the latter is working
| Move on to Step | 1. Power supplies/earths incorrect | 1. Restore correct power supplies/earths See E3022 HEADLAMP WASHER |
| 2. Windscreen wiper motor faulty; | 2. Replace the windscreen wiper motor |
| 4 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the fault is no longer present | | | |