Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Horn Diagnostic System Check? | -- | Go to Step 2 | |
2 | Inspect the HORN fuse at the underhood fuse block. Is the fuse functional? | -- | Go to Step 4 | Go to Step 3 |
3 | Locate and repair the overload and replace the HORN fuse. Refer to Circuit Testing in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 6 |
5 | Connect a DMM between the right horn connector CKT 350 (BLK) cavity A to ground. Did you find continuity? | -- | Go to Step 7 | Go to Step 8 |
6 |
Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 10 |
7 | Replace the right horn. Refer to Horn Replacement . Did you complete the replacement? | -- | Go to Step 25 | -- |
8 | Repair the open in CKT 350 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
9 | Connect a DMM between the left horn connector CKT 250 (BLK) cavity A to ground. Did you find continuity? | -- | Go to Step 11 | Go to Step 12 |
10 |
Does the test lamp illuminate? | -- | Go to Step 14 | Go to Step 13 |
11 | Replace the left horn. Refer to Horn Replacement . Did you complete the replacement? | -- | Go to Step 25 | -- |
12 | Repair the open in CKT 250 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
13 | Repair the open in CKT 740 (ORN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
14 | Momentarily connect a fused jumper between the horn relay cavity H4 to cavity G6. Did the horns sound? | -- | Go to Step 15 | Go to Step 16 |
15 | Connect a test lamp between the horn relay CKT 740 (ORN) cavity G4 to ground. Does the test lamp illuminate? | -- | Go to Step 17 | Go to Step 18 |
16 | Repair the open in CKT 29 (DK GRN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
17 |
Does the test lamp illuminate? | -- | Go to Step 19 | Go to Step 20 |
18 | Repair the open in CKT 740 (ORN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
19 | Replace the horn relay. Did you complete the repair? | -- | Go to Step 25 | -- |
20 |
Did the horns sound? | -- | Go to Step 21 | Go to Step 22 |
21 | Replace the horn switch. Refer to Horn Switch Replacement - On Vehicle in Steering Wheel and Column - Standard. Did you complete the replacement? | -- | Go to Step 25 | -- |
22 | Inspect for an open in the wiring between the horn switch and the convenience center. Refer to Circuit Testing in Wiring Systems. Did you find an open? | -- | Go to Step 23 | Go to Step 24 |
23 | Repair the open in CKT 28 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 25 | -- |
24 | Replace the horn brush and the horn slip ring. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Standard. Turn Signal and Multifunction Switch Assembly - Disassemble - Off Vehicle Turn Signal and Multifunction Switch Assembly - Assemble - Off Vehicle in Steering Wheel and Column - Tilt. Did you complete the repair? | -- | Go to Step 25 | -- |
25 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
