| | Results of the tests |
| 1 | CHECK INDIVIDUAL LIGHTS | All OK | Problems met | Operation |
|---|
| Check
the condition of individual bulbs and lamps | Continue to Step 2 | Bulb damaged | Change bulbs |
| Lamp defective | Repair or replace the fog lamp Op. 5540D10 |
| 2 | CHECK FOG LAMP ELECTRIC CIRCUIT | All OK | Problems met | Operation |
|---|
| Check, in order: - fog lamp fuse
- control panel supply fuse
- fog lights relay.
- control panel power supply
- connection between relay and control panel
- connection between relay and bulb
- relay earth and bulbs
- control panel earth
( See E2030 FOG LIGHTS ). | Continue to Step 3 | Component defective | Replace the component involved
(if a fuse is involved, search for the cause of the problem) |
| Connections broken | Restore the connections |
| 3 | CHECK FOG LAMP SWITCH | All OK | Problems met | Operation |
|---|
| Check
the fog lamp switch located in the control panel in the centre of
the facia is working properly. See E2030 FOG LIGHTS  | The switch is built into an electronic
control device, which controls the fog lamp operating software. |
| Continue to Step 4 | Fog lamp switch defective | Repair the fog lamp switch
or change the control panel Op. 7065C10 |
| 4 | CHECKING 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' |