Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Are the stop lamps OFF? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Disconnect the brake switch. Are the stop lamps illuminated? | Go to Step 4 | Go to Step 10 |
4 | Disconnect the center high mount stop lamp (CHMSL) relay. Are the stop lamps illuminated? | Go to Step 7 | Go to Step 5 |
5 | Probe CHMSL supply voltage circuit of the CHMSL relay with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 9 |
6 | Test the CHMSL supply voltage circuit of the CHMSL relay for a short to voltage. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 13 | Go to Step 8 |
7 | Repair a short to battery positive voltage in the stop lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs. Did you complete the repair? | Go to Step 13 | -- |
8 | Repair a short to battery positive voltage in the stop lamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs. Did you complete the repair? | Go to Step 13 | -- |
9 | Inspect for poor connections at the CHMSL relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 13 | Go to Step 11 |
10 | Inspect for poor connections at the harness connector of the brake switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
11 | Replace the CHMSL relay. Refer to Relay Replacement. Did you complete the replacement? | Go to Step 13 | -- |
12 | Replace the brake switch. Refer to Stop Lamp Switch Replacement. Did you complete the replacement? | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
