Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics | |||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |
2 | Verify the fault is present. Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
3 |
Do the brake lamps go out? | Go to Step 9 | Go to Step 4 |
4 | Remove the CHMSL fuse. Refer to Testing for a Short to Voltage in Wiring Systems. Do the brake lamps go out? | Go to Step 5 | Go to Step 6 |
5 | Repair the short to voltage in the fused trailer CHMSL feed circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | -- |
6 | Remove the VEH STOP fuse. Refer to Wiring Repairs in Wiring Systems. Do the brake lamps go out? | Go to Step 7 | Go to Step 8 |
7 | Repair the short to voltage in the stoplamp switch output circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | -- |
8 | Repair the short to voltage in the fused CHMSL feed circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | -- |
9 | Replace the stoplamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Did you complete the repair? | 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 |
