Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Horns System Check? | -- | Go to Step 2 | Go to Horns System Check |
2 | Remove the horn relay from the underhood fuse block. Does the horn stop sounding? | -- | Go to Step 4 | Go to Step 3 |
3 | Locate and Repair the short to B+ in CKT 29 (DK GRN) between the underhood fuse block and the left horn or the right horn (if equipped). Refer to Wiring Repairs in Wiring. Is the repair complete? | -- | Go to Horns System Check | -- |
4 | Connect a DMM between cavities D1 and C3 of the horn relay. Is there continuity? | -- | Go to Step 5 | Go to Step 6 |
5 | Replace the horn relay. Is the repair complete? | -- | Go to Horns System Check | -- |
6 |
Is there battery voltage? | -- | Go to Step 7 | Go to Step 8 |
7 | Locate and Repair the short to ground in CKT 28 (BLK) between C100 and the underhood fuse block. Refer to Wiring Repairs in wiring. Is the repair complete? | -- | Go to Horns System Check | -- |
8 |
Is there battery voltage? | -- | Go to Step 12 | Go to Step 9 |
9 |
Is there battery voltage? | -- | Go to Step 10 | Go to Step 11 |
10 | Locate and repair the short to ground in CKT 28 (BLK) between C210 and remote control door lock receiver or vehicle interface unit (luxury). Refer to Wiring Repairs in wiring. Is the repair complete? | -- | Go to Horns System Check | -- |
11 | Replace remote control door lock receiver or vehicle interface unit (luxury). Refer to Remote Control Door Lock Receiver Replacement in doors. Is the repair complete? | -- | Go to Horns System Check | -- |
12 | Does the vehicle contain a body control module (BCM)? | -- | Go to Step 13 | Go to Step 15 |
13 |
Is there battery voltage? | -- | Go to Step 15 | Go to Step 14 |
14 | Replace the body control module. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | Go to Horns System Check | -- |
15 |
Is there battery voltage? | -- | Go to Step 16 | Go to Step 17 |
16 | Locate and repair the short to ground in CKT 28 (BLK) between C100, BCM C1, C266 or C210. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Horns System Check | -- |
17 |
Is there battery voltage? | -- | Go to Step 18 | Go to Step 19 |
18 | Locate and repair the short to ground in CKT 28 (BLK) between C266 and the horn switch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Horns System Check | -- |
19 | Replace the horn switch. Refer to Horn Switch Replacement - On Vehicle in Manual Steering. Is the repair complete? | -- | Go to Horns System Check | -- |
