|  |  | Results of the tests | 
| 0 | PRELIMINARY CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
that the side lights come on when the parking light button is operated | Continue to Step 3 | Side lights do not come
on | Continue
to Step  1 | 
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | Connect
the diagnostic equipment (Examiner) to the tester input and check
for faults. | Continue to Step 2 | Faults present | Continue as instructed by
the tester | 
| 2 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | Keep
the diagnostic equipment connected to the tester input and check
bulb operation by means of active diagnosis | Continue to Step 3 | No light comes on | Replace the Body Computer  Op. 5505A32 | 
| 3 | CHECKING ELECTRICAL EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | check
continuity and insulation of wiring between Exterior Lighting Control
and Body Computer Node  See   E2010  SIDE LIGHTS / NO. PLATE LIGHTS Check stalk unit earth connection | Continue to Step 4 | Connection between CLE
and Body Computer Node short-circuited or with open circuit | Renew the electrical connections  See   E2010  SIDE LIGHTS / NO. PLATE LIGHTS | 
| Earth not present | Renew the electrical connections  See   E2010  SIDE LIGHTS / NO. PLATE LIGHTS | 
| 4 | CHECKING EXTERIOR LIGHTING CONTROL | All OK | Problems met | Operation | 
|---|
|  | Check
the condition of the stalk control.  See Test   5550AA  Checking stalk unit operation | Continue to Step 5 | Stalk unit switch not
working | Replace
the steering column switch unit Op.   5550A12 | 
| 5 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present |  | Fault persists | Search for the fault starting from another symptom' |