Courtesy Lamps Always On Without RPO Y91
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Schematics | |||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |
2 | Operate the courtesy lamps to verify the fault is present. Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
3 | Remove the courtesy lamp relay Are the courtesy lamps illuminated? | Go to Step 8 | Go to Step 4 |
4 |
Important: The courtesy lamps must be in the OFF position, the doors closed, and 60 seconds must pass before testing this circuit. Connect a test lamp between the courtesy lamp relay coil control circuit of the courtesy lamp relay connector and a battery positive voltage circuit. Does the test lamp illuminate? | Go to Step 5 | Go to Step 6 |
5 | Test the courtesy lamp switch signal circuit for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the courtesy 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 11 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the body control 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 11 | Go to Step 10 |
8 | Repair the short to ground in the courtesy lamp relay low control circuit. Did you complete the repair? | Go to Step 11 | -- |
9 | Replace the courtesy lamp relay. Did you complete the replacement? | Go to Step 11 | -- |
10 |
Important: Perform the setup procedure for the body control module. Replace the body control module. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 11 | -- |
11 | Operate the system in order to verify the repair. Did you correct the condition? | Go to Step 3 | -- |
Courtesy Lamps Always On With RPO Y91
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Interior Lights Schematics | ||||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | ||
2 | Operate the courtesy lamps to verify the fault is present. Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 | |
3 | Remove the courtesy lamp module. Are the courtesy lamps illuminated? | Go to Step 8 | Go to Step 4 | |
4 |
Important: The courtesy lamps must be in the OFF position, the doors closed, and 60 seconds must pass before testing this circuit. Measure the voltage between the courtesy lamp low control circuit of the courtesy lamp module connector and a battery positive voltage circuit. Does the voltage measure near the specified voltage? | 12 V | Go to Step 5 | Go to Step 6 |
5 | Test the courtesy lamp low control circuit for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
6 | Inspect for poor connections at the harness connector of the courtesy lamp 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 11 | Go to Step 9 | |
7 | Inspect for poor connections at the harness connector of the body control 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 11 | Go to Step 10 | |
8 | Repair the short to voltage in the courtesy lamp PWM supply voltage circuit. Did you complete the repair? | Go to Step 11 | -- | |
9 | Replace the courtesy lamp module. Refer to Lamp Control Module Replacement . Did you complete the replacement? | Go to Step 11 | -- | |
10 |
Important: Perform the setup procedure for the body control module. Replace the body control module. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 11 | -- | |
11 | Operate the system in order to verify the repair. Did you correct the condition? | Go to Step 3 | -- | |
