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 | Place the marker lamp switch in the ON position. Do the marker lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 14 |
4 | Connect a fused jumper wire between the marker lamp relay switch side voltage input circuit and switch side voltage output circuit. Do the marker lamps illuminate? | Go to Step 6 | Go to Step 5 |
5 | Does the fuse in the jumper wire open? | Go to Step 15 | Go to Step 11 |
6 |
Does the test lamp illuminate? | Go to Step 7 | Go to Step 8 |
7 | Connect a test lamp between the marker lamp relay coil side control circuit and the coil side ground circuit. Does the test lamp illuminate? | Go to Step 12 | Go to Step 16 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 17 |
9 |
Does the test lamp illuminate? | Go to Step 13 | Go to Step 10 |
10 | Does the fuse in the jumper wire open? | Go to Step 18 | Go to Step 19 |
11 |
Does the test lamp illuminate? | Go to Step 20 | Go to Step 21 |
12 | Inspect for poor connections at the marker lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 24 | Go to Step 22 |
13 | Inspect for poor connections at the marker lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 24 | Go to Step 23 |
14 | Repair an open or short to ground in the marker lamp relay switch side voltage input circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
15 | Repair a short to ground in the marker lamp relay switch side voltage output circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
16 | Repair an open in the marker lamp relay coil side ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
17 | Repair an open in the marker lamp switch's switch side voltage input circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
18 | Repair a short to ground in the marker lamp relay switch side voltage output circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
19 | Repair an open in the marker lamp relay switch side voltage output circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
20 | Repair an open in the marker lamps ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
21 | Repair an open in the marker lamps voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 24 | -- |
22 | Replace the marker lamp relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 24 | -- |
23 | Replace the marker lamp switch. Refer to Trailer Marker Lamp Switch Replacement . Did you complete the replacement? | Go to Step 24 | -- |
24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
