Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the test lamp illuminate and flash with both the left and right sides? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Do the vehicles turn signals operate properly? | Go to Step 4 | |
4 |
Does the test lamp illuminate and flash? | Go to Step 5 | Go to Step 10 |
5 | Connect a test lamp between the turn trailer relays coil side control circuit and the coil side ground circuit. Does the test lamp illuminate and flash? | Go to Step 6 | Go to Step 11 |
6 | Probe the switch side voltage supply circuit of the turn trailer relay with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 12 |
7 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 8 |
8 | Does the fuse in the jumper wire open? | Go to Step 13 | Go to Step 14 |
9 | Inspect for poor connections at the appropriate turn trailer relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 15 |
10 | Repair an open or short to ground in the turn trailer relays coil side control circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- |
11 | Repair an open in the turn trailer relays coil side ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- |
12 | Repair an open or short to ground in the turn trailer relays switch side voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- |
13 | Repair a short to ground in the tractor/trailer receptacle turn signal voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- |
14 | Repair an open in the tractor/trailer receptacle turn signal voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- |
15 | Replace the appropriate turn trailer relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |