Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
Schematic Reference: Exterior Lights Schematics | |||||||
1 | Did you review the exterior lighting operation and perform the necessary inspections? | Go to Step 2 | |||||
2 | Place the marker lamp switch in the OFF position. Are the marker lamps OFF? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 | Disconnect the marker lamp relay. Do the marker lamps remain illuminated? | Go to Step 6 | Go to Step 4 | ||||
4 | Probe the marker lamp relay coil side control circuit with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 8 | ||||
5 |
Does the test lamp remain illuminated? | Go to Step 7 | Go to Step 9 | ||||
6 | Repair a short to voltage in the marker lamps voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | -- | ||||
7 | Repair a short to voltage in the marker lamp relay coil side control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | -- | ||||
8 | Replace the marker lamp relay. Refer to Did you complete the replacement? | Go to Step 10 | -- | ||||
9 | Replace the marker lamp switch. Refer to Trailer Marker Lamp Switch Replacement . Did you complete the replacement? | Go to Step 10 | -- | ||||
10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||
