|  |  | Results of the tests | 
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation | 
|---|
|  | Check
the oepration of the light check device. If the side lights or number
plate lights do not work, the light failure warning light comes
on. | Continue to Step 
                              1 | The fault is not indicated
by the light failure warning light. | See table 
                                 I30 | 
| 1 | CHECK INDIVIDUAL LIGHTS | All OK | Problems met | Operation | 
|---|
|  | Check
the condition of the individual bulbs and the bulb holder assembly | Continue to Step 
                              2 | Bulbs damaged | Replace bulbs | 
| Rear lights cluster faulty | Repair or replace the rear lights cluster
                               Op.   5540A80 | 
| Front lights cluster faulty | Repair or replace front lights cluster
                               Op.   5540B26 | 
| No. plate lights faulty | Renew or replace the no. plate lights
                               Op.   5540A94 | 
| 2 | SIDE LIGHTS ELECTRICAL CIRCUIT CHECK | All OK | Problems met | Operation | 
|---|
|  | (
                               See   E2010  SIDE LIGHTS / NO. PLATE LIGHTS 
                              ).connections between the ignition
switch and the stalk unitthe connection between the stalk unt and the rev counterconnections between the rev counter and bulbsbulbs earth
 | Continue to Step 
                              3 | Connections broken | Restore the connections
( | 
| 3 | STEERING COLUMN SWITCH UNIT CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
the stalk unit is working properly: in particular, check the side
light switch 
                               see DESCRIPTION AND OPERATION: 5550A stalk unit | Continue to Step 
                              4 | Stalk unit not working
properly | Replace
the steering column switch unit 
                               Op.   5550A12 | 
| 4 | CHECK IGNITION SWITCH | All OK | Problems met | Operation | 
|---|
|  | Check
that the side lights come on when the ignition key is turned in
the opposite direction | Continue to Step 
                              5 | Ignition switch faulty | Renew or replace the ignition
switch 
                               Op. 5520A10 | 
| 5 | CHECK CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present | End of diagnosis | Fault persists | Search for the
fault starting from another symptom' |