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 Relay Replacement in Wiring Systems. 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 |
