Courtesy Lamps Inoperative Lamps
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Interior Lights Schematics | |||||||||
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | |||||||
2 | Verify that the courtesy/dome lamps are inoperative. Do the courtesy/dome lamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 | Are all courtesy lamps inoperative? | Go to Step 5 | Go to Step 4 | ||||||
4 | Test the voltage supply and ground circuits of the inoperative lamp for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 | ||||||
5 | Are the courtesy lamps inoperative from a specific switch only? | Go to Step 9 | Go to Step 6 | ||||||
6 | Is the vehicle equipped with RPO YF7? | Go to Step 7 | Go to Step 9 | ||||||
7 | Is the CTSY LP/SEO fuse in the body fuse block open? | Go to Step 15 | Go to Step 8 | ||||||
8 | Test the courtesy lamp supply voltage circuit of the courtesy lamps for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 12 | ||||||
9 | Observe the related body control module (BCM) data parameters in both positions. Refer to Scan Tool Data List and Scan Tool Data Definitions for typical values and definitions:
Was a problem found? | Go to Step 10 | Go to Step 14 | ||||||
10 | Disconnect and test the switch of the affected input circuit for proper continuity in the open and closed or on and off positions. Refer to Testing for Continuity in Wiring Systems. Is continuity correct in both positions? | Go to Step 11 | Go to Step 13 | ||||||
11 | Test the signal and ground circuits of the affected switch for a short to ground, open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 14 | ||||||
12 | Inspect for poor connections at the harness connector of the CTSY LP Relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 16 | ||||||
13 | Inspect for poor connections at the harness connector of the affected switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 17 | ||||||
14 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 | ||||||
15 | Repair the courtesy lamp supply voltage circuit for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- | ||||||
16 | Replace the CTSY LP Relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 20 | -- | ||||||
17 | Replace the switch in the affected circuit. Refer to one of the following replacement procedures as applicable:
Did you complete the replacement? | Go to Step 20 | -- | ||||||
18 | Replace the inoperative bulb. Did you complete the replacement? | Go to Step 20 | -- | ||||||
19 |
Important: Perform the setup procedure for the BCM. Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 20 | -- | ||||||
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||||
Courtesy Lamps Inoperative Defeat Switch
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System | |||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |
2 |
Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp alternate on and off as expected? | Go to Step 6 | Go to Step 4 |
4 | Test the interior lamp defeat switch signal circuit of the BCM for a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
5 | Inspect for poor connections at the harness connector of the headlamp 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 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the BCM. 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 9 | Go to Step 8 |
7 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 9 | -- |
8 |
Important: Perform the setup procedure for the BCM. Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
