| | Results of the tests |
| 1 | BRAKE LIGHTS ELECTRICAL CIRCUIT CHECK | All OK | Problems met | Operation |
|---|
| Check, in order: - fuse;
- connections between DASHBOARD control unit and brake pedal
switch;
- connections between DASHBOARD control unit and bulbs;
- bulb earth See E2021 BRAKE LIGHTS
| Continue to Step 2 | Defective component | Replace the component involved
(if a fuse is involved, search for the cause of the problem) |
| Connections broken | Restore the connections: See E2021 BRAKE LIGHTS |
| Faulty earth | Restore the earth contact See E2021 BRAKE LIGHTS |
| 2 | CHECK ON BRAKE PEDAL SWITCH | All OK | Problems met | Operation |
|---|
| Check
that the brake pedal switch is fitted correctly and working See E2021 BRAKE LIGHTS | Continue to Step 3 | Switch fastening / adjustment
incorrect | Adjust the switch |
| Switch fastening / adjustment incorrect | Replace the switch |
| 3 | CHECKING FACIA CONTROL UNIT | All OK | Problems met | Operation |
|---|
| Check
the continuity of the facia control unit internal circuit See E2021 BRAKE LIGHTS | Continue to Step 4 | Facia control unit circuit
broken | Change
the facia junction unit |
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check
that all the brake lights come on | End of diagnosis | | |
