| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Press the parking light activation button, move the steering wheel stalk and check the parking lights come on.Press the emergency light switch and check they activate correctly.Then turn the key ON and check the operation of the side lights/number plate lights.Activate the rear fog lamp from the control panel and check they operate correctly.Operate the side lights from the stalk and check they operate correctlyPress the brake pedal and check the brake lights come on | Move on to Step 1 | 1. Parking light bulb does not operate | 1. Continue as described by the diagnostic equipment | 
| 2. Side light/number plate light bulb does not operate | 2. Continue as described by the diagnostic equipment | 
| 3. Hazard light bulb does not operate | 3. Continue as described by the diagnostic equipment | 
| 4. Turn signal does not operate | 4. Continue as described by the diagnostic equipment | 
| 5. Rear fog lamp bulb does not operate | 5. Continue as described by the diagnostic equipment | 
| 6. Brake light bulb does not operate | 6. Continue as described by the diagnostic equipment | 
| 1 | CHECK ELECTRICAL CONNECTIONS | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check the electrical connections between the Body Computer and the light wiring, in particular that each individual pin is correctly connected | Move on to Step 2 | Electrical connections defective | Renew the damaged electrical connections | 
| 2 | CHECK BULB POWER UPTAKE | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check that the light bulb power uptake is as specified | Move on to Step 3 | Bulbs of incorrect power rating or with defective filament | Replace the bulbs | 
| 3 | CHECK INSTRUMENT PANEL | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Connect an Examiner to check for errors in the instrument panel | Move on to Step 4 | Panel defective | Replace the instrument panel    Op. 5560B10 CONTROL PANEL - R+R | 
| 4 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check that the fault is no longer present | End of diagnosis | The fault persists | Replace Body Computer    Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |