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 headlamp switch in the PARK or HEADLAMP position. Do the park lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 12 |
4 | Connect a fused jumper wire between the tail lamp relay switch side voltage input circuit and switch side voltage output circuit. Do the park lamps illuminate? | Go to Step 6 | Go to Step 5 |
5 | Does the fuse in the jumper wire open? | Go to Step 13 | Go to Step 14 |
6 | Probe the tail lamp relay coil side voltage supply circuit with a test lamp that is connected to a good ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 15 |
7 |
Does the test lamp illuminate? | Go to Step 10 | Go to Step 8 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 16 |
9 | Connect a test lamp between the tail lamp relay coil side control circuit and the ground circuit at the headlamp switch connector. Does the test lamp illuminate? | Go to Step 11 | Go to Step 17 |
10 | Inspect for poor connections at the tail lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
11 | Inspect for poor connections at the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
12 | Repair an open or short to ground in the tail lamp relay switch side voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
13 | Repair a short to ground in the park lamps voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
14 | Repair an open in the park lamps voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
15 | Repair an open in the tail lamp relay coil side voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
16 | Repair an open in the tail lamp relay coil side control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
17 | Repair an open in the headlamp switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
18 | Replace the tail lamp relay. Refer to Did you complete the replacement? | Go to Step 20 | -- |
19 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
