Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Horn Schematics DEFINITION: Horns Inoperative at all times | |||
1 | Did you review the Horn System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Is voltage present? | Go to Step 3 | Go to Step 4 |
3 | Using a test lamp, test for battery positive voltage at the coil side of the relay battery positive voltage circuit. Is voltage present? | Go to Step 5 | Go to Step 4 |
4 | Repair the open or short in the battery positive circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems Did you find and correct the condition? | Go to Step 18 | -- |
5 |
Is ground present? | Go to Step 7 | Go to Step 6 |
6 |
Is ground present? | Go to Step 7 | Go to Step 12 |
7 |
Is voltage present? | Go to Step 9 | Go to Step 15 |
8 | Repair the open in the horn switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and complete the repair? | Go to Step 18 | -- |
9 | With the horn connector still disconnected, Test the ground circuit for ground. Refer to Circuit Testing in Wiring Systems. Is there ground present? | Go to Step 10 | Go to Step 11 |
10 | Replace the horn. Refer to Horn Replacement . Did you complete the replacement? | Go to Step 18 | -- |
11 | Repair the open in the horn ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | -- |
12 | Using a test lamp connected to battery positive voltage, test the horn switch ground circuit for ground. Refer to Wiring Repairs in Wiring Systems. Is ground present? | Go to Step 13 | Go to Step 14 |
13 | Replace the horn switch. Did you complete the replacement? | Go to Step 18 | -- |
14 | Repair the open in the horn switch ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you correct the condition? | Go to Step 18 | -- |
15 | With the horn switch depressed, Test the horn feed circuit at the relay for battery positive voltage. Refer to Circuit Testing in Wiring Systems Is voltage present? | Go to Step 16 | Go to Step 17 |
16 | Repair the open in the horn supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 18 | -- |
17 | Replace the horn relay. Did you complete the replacement? | Go to Step 18 | -- |
18 | Operate the system in order to verify repair. Did you correct the condition? | System OK | Go to Step 2 |
