Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics | |||
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | |
2 |
Do the stop lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Operate the turn signal lamps. Do the rear turn signal lamps operate properly? | Go to Step 4 | |
4 | Is only the center high mounted stop lamp (CHMSL) inoperative? | Go to Step 6 | Go to Step 5 |
5 | Is there only one inoperative stop lamp? | Go to Step 8 | Go to Step 10 |
6 |
Does the test lamp illuminate? | Go to Step 7 | Go to Step 19 |
7 | Connect a test lamp between the stop lamp switch signal circuit of the CHMSL and the ground circuit of the CHMSL. Does the test lamp illuminate? | Go to Step 16 | Go to Step 20 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 13 |
9 | Connect a test lamp between the supply voltage circuit of the inoperative stop lamp and the ground circuit of the inoperative stop lamp. Does the test lamp illuminate? | Go to Step 17 | Go to Step 20 |
10 |
Does the test lamp illuminate? | Go to Step 14 | Go to Step 11 |
11 |
Does the test lamp illuminate? | Go to Step 12 | Go to Step 18 |
12 | Connect a 15 amp fused jumper between the battery positive voltage circuit of the stop lamp switch and the stop lamp switch signal circuit. Do the stop lamps illuminate? | Go to Step 15 | Go to Step 19 |
13 | Test for an open or high resistance in the supply voltage circuit of the appropriate stop lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 14 |
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 in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 22 |
15 | Inspect for poor connections at the harness connector of the stop lamp 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 26 | Go to Step 23 |
16 | Inspect for poor connections at the harness connector of the CHMSL. 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 26 | Go to Step 24 |
17 | Inspect for poor connections at the harness connector of the appropriate stop lamp. 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 26 | Go to Step 25 |
18 | Repair an open or high resistance in the battery positive voltage circuit of the stop lamp switch. Refer to Wiring Repairs in Wiring Systems. Did you complete repair? | Go to Step 26 | -- |
19 | Repair an open or high resistance in the stop lamp switch signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete repair? | Go to Step 26 | -- |
20 | Repair an open or high resistance in the ground circuit of the appropriate stop lamp. Refer to Wiring Repairs in Wiring Systems. Did you complete repair? | Go to Step 26 | -- |
21 | Repair an open or high resistance in the battery positive voltage circuit of the stop lamp switch. Refer to Wiring Repairs in Wiring Systems. Did you complete repair? | Go to Step 26 | -- |
22 | Replace the turn/hazard flasher module. Refer to Hazard and Turn Signal Flasher Replacement . Did you complete replacement? | Go to Step 26 | -- |
23 | Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Did you complete replacement? | Go to Step 26 | -- |
24 | Replace the CHMSL. Refer to High Mount Stop Lamp Replacement . Did you complete replacement? | Go to Step 26 | -- |
25 | Replace the appropriate stop lamp. Refer to Tail Lamp Replacement . Did you complete replacement? | Go to Step 26 | -- |
26 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
