Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Check the HORN fuse for an open. Is the HORN fuse open? | -- | ||
2 |
Is the HORN fuse open again? | -- | ||
3 |
Does the test light illuminate? | -- | ||
4 |
Does the test light illuminate? | -- | ||
5 |
Does the test light illuminate? | -- | ||
6 | Place the horn relay back in the underhood accessory wiring junction block. Is the HORN fuse open again? | -- | ||
7 |
Is the HORN fuse open? | -- | ||
8 | Using a test light, frontprobe between the other horn relay circuit 740 and ground. Does the test light illuminate? | -- | ||
9 |
Does the test light illuminate? | -- | ||
10 |
Does the test light illuminate? | -- | ||
11 | Check for a poor connection at the switch ground in the steering wheel. Is there a poor connection? | -- | ||
12 | Momentarily connect a 5A fused jumper between the horn relay terminals for circuit 29 and circuit 740. Do the horns sound? | -- | ||
13 |
Does the test light illuminate? | -- | ||
14 | With a test light, frontprobe between the horn assembly connector terminal A and B+. Does the test light illuminate? | -- | ||
15 |
Does the test light illuminate? | -- | ||
16 | Replace the underhood accessory wiring junction block. Refer to Accessory Wiring Junction Block Replacement for service procedure. Is the repair complete? | -- | -- | |
17 | Replace the horn relay. Refer to Horn Relay Replacement for service procedure. Is the repair complete? | -- | -- | |
18 | Repair short to ground in circuit 29. Is the repair complete? | -- | -- | |
19 | Repair a short to B+ or an open in circuit 28. Is the repair complete? | -- | -- | |
20 | Replace the horn assembly. Refer to Horn Replacement for service procedure. Is the repair complete? | -- | -- | |
21 | Repair open in circuit 1250. Is the repair complete? | -- | -- | |
22 | Repair poor connection at the switch ground. Is the repair complete? | -- | -- | |
23 | The horn switch is part of the SIR steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement for service procedure. Is the repair complete? | -- | -- | |
24 | Repair poor connection or open in circuit 29. Is the repair complete? | -- | -- |
