Horns Inoperative Both Do Not Sound
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Use a test lamp in order to backprobe the relay center 2 from the horn relay terminal 30 to ground. Did the test lamp light? | -- | Go to Step 2 | Go to Step 8 |
2 | Use a test lamp in order to backprobe the relay center 2 from the horn relay terminal 86 to ground. Did the test lamp light? | -- | Go to Step 3 | Go to Step 9 |
3 | Use a test lamp in order to backprobe the relay center 2 from the horn relay terminal 85 to B+, while pressing the horn switch. Did the test lamp light? | -- | Go to Step 4 | Go to Step 7 |
4 | Use a test lamp in order to backprobe the relay center 2 from the horn relay terminal 87 to ground, while pressing the horn switch. Did the test lamp light? | -- | Go to Step 5 | Go to Step 10 |
5 |
Did the test lamp light? | -- | Go to Step 6 | Go to Step 11 |
6 | Connect a test lamp from terminal B to B+. Did the test lamp light? | -- | Go to Step 12 | Go to Step 13 |
7 | Use a test lamp in order to backprobe the combination switch connector from terminal 10 to B+, while pressing the horn switch. Did the test lamp light? | -- | Go to Step 14 | Go to Step 15 |
8 | Locate and repair the open between the IP fuse block and the relay center 2. Is the repair complete? | -- | System OK | -- |
9 | Locate and repair the open in CKT 171 (ORN) between S285 and the relay center 2. Is the repair complete? | -- | System OK | -- |
10 | Replace the horn relay. Is the repair complete? | -- | System OK | -- |
11 | Locate and repair the open in CKT 29 (DK GRN) between the horn relay and C101. Is the repair complete? | -- | System OK | -- |
12 |
Is the repair complete? | -- | System OK | -- |
13 | Locate and repair the open in CKT 150 (BLK) to G107. Is the repair complete? | -- | System OK | -- |
14 | Locate and repair the open in CKT 170 (GRN/RED) between the relay center 2 and the combination switch connector. Is the repair complete? | -- | System OK | -- |
15 | Replace the horn switch. Is the repair complete? | -- | System OK | -- |
Horns Inoperative One Does Not Sound
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Use a test lamp in order to backprobe the inoperative horn from CKT 29 (DK GRN) to ground while pressing the horn switch. Did the test lamp light? | -- | Go to Step 2 | Go to Step 3 |
2 | Use a test lamp in order to backprobe the inoperative horn from CKT 150 (BLK) to B+. Did the test lamp light? | -- | Go to Step 4 | Go to Step 5 |
3 | Repair the open in CKT 29 (DK GRN) between S100 and the inoperative horn. Does the dual horn operate properly? | -- | System OK | -- |
4 | Replace the inoperative horn. Does the dual horn operate properly? | -- | System OK | -- |
5 | Repair the open in CKT 150 (BLK) between the inoperative horn and S101. Does the dual horn operate properly? | -- | System OK | -- |
