Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Observe the stop lamps while pressing the brake pedal. Does the system operate normally? | Go to Step 3 | |
3 | Is only one stop lamp inoperative? | Go to Step 6 | Go to Step 4 |
4 | Are all stop lamps inoperative? | Go to Step 8 | Go to Step 5 |
5 | While depressing the brake pedal, test for a voltage signal at the stop lamp switch signal terminal of the turn/hazard flasher module connector. Refer to Circuit Testing. Is voltage present? | Go to Step 14 | Go to Step 15 |
6 | Test the supply voltage circuit of the inoperative lamp for high resistance, an open, or a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 7 |
7 | Test the ground circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 12 |
8 | Disconnect the stop lamp switch. Connect a 3-amp fused jumper wire between the battery positive voltage terminal and the stop lamp switch signal terminal of the stop lamp switch. Do the stop lamps illuminate? | Go to Step 13 | Go to Step 9 |
9 | Test the battery positive circuit of the stop lamp switch for high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 10 |
10 | Test the stop lamp switch signal circuit of the stoplamp switch for a high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 11 |
11 | Test the turn/stop lamp supply voltage circuit between the turn/hazard flasher module, body fuse block, and the underhood fuse block for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 14 |
12 | Inspect for poor connections at the harness connector of the bulb or high mount stop lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 16 |
13 | Inspect for poor connections at the harness connector of the switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 17 |
14 | Inspect for poor connections at the harness connector of the turn/hazard flasher module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 19 | Go to Step 18 |
15 | Repair the stop lamp switch signal circuit. Refer to Wiring Repairs. Did you complete the repair? | Go to Step 19 | -- |
16 | Replace the stop lamp. Refer to Tail Lamp Replacement or High Mount Stop Lamp Replacement. Did you complete the replacement? | Go to Step 19 | -- |
17 | Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement. Did you complete the replacement? | Go to Step 19 | -- |
18 | Replace the turn/hazard flasher module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 19 | -- |
19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
