| | Test results |
| 1 | RELAY CHECK | All OK | Problems encountered | Operation |
|---|
| Remove the relay for the horn and check that it stops sounding.Check the insulation of the wiring between the button on the steering wheel and the horn See E3010 HORNS | Move on to Step 2 | 1. The horn continues to sound even without the relay2. Wiring not correctly insulated3. The horn stops working | 1. Replace engine compartment junction unitOp. 5505A13 2. Restore the correct insulation3. Replace the relay |
| 2 | CLOCK SPRING CHECK | All OK | Problems encountered | Operation |
|---|
| Check the insulation of the connection between the clock spring on the steering column switch unit and earth See E3010 HORNS | Move on to Step 3 | 1. Wiring insulation not correct between clock spring and earth.2. Clock spring short circuited to earth | 1. Restore the correct insulation2. Replace the steering column switch unit Op. 5550A10 STALK UNIT ASSEMBLY - R+R |
| 3 | HORN ELECTRICAL CHECK | All OK | Problems encountered | Operation |
|---|
| Check the button on the steering wheel is working properly | End of diagnosis | Button on steering wheel mechanicall stuck | Replace the horn control Op. 5550B30 L/H OR R/H HORN (ONE) - R+R |