Fault diagnosis
N20 HORNS NOT WORKING
Engines: 2.0 16V, 2.0 JTD 8V, 2.3 JTD 16V, 2.8 JTD 8V
| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS | ||
|---|---|---|---|---|
| 1 | ELECTRICAL SYSTEM CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check the condition of the horn circuit fuse See E3010 HORNS | Move on to Step | Fuse blown | Find out the reason for the blown fuse and repair the circuit See E3010 HORNS | |
| 2 | ELECTRICAL SYSTEM CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check continuity between earth and horn circuit relay input See E3010 HORNS | Move on to Step | 1. Connections inefficient | 1. Restore correct operation | |
| 2. Horn button defective | 2. Replace horn button See E3010 HORNS | |||
| 3 | ELECTRICAL SYSTEM CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
Check:
| Move on to Step | 1. Relay defective. | 1. Replace the defective relay | |
| 2. Relay supply fault | 2. Restore correct operation See E3010 HORNS | |||
| 4 | ELECTRICAL SYSTEM CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check horn earth connection efficiency See E3010 HORNS | Move on to Step | Earth inefficient | Restore earth connection See E3010 HORNS | |
| 5 | ELECTRICAL SYSTEM CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check the efficiency of the horn positive supply lead See E3010 HORNS | Move on to Step | Connections inefficient | Restore supply connection See E3010 HORNS | |
| 6 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check correct horn operation | Horn not working | Change the horn See E3010 HORNS | ||