For 1990-2009 cars

## Courtesy Lamps Inoperative From Door Switches

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Interior Lights Schematics
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems
2 | Open each door of the vehicle, one at a time, using the following procedure:

1. Open the vehicle's door.
2. Observe the courtesy lamps.
3. Close the vehicle's door.
4. Wait 10 seconds.

Do the courtesy lamps illuminate when each door is opened?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3 | Are the courtesy lamps inoperative from all of the doors? | Go to Step 4 | Go to Step 6
4 | Place the dome lamp in the ON position. Does the dome lamp illuminate? | Go to Step 10 | Go to Step 5
5 |

1. Disconnect the body control module (BCM).
2. Probe the battery positive voltage circuit of the BCM with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 11

Go to Step 12

6 | Are the courtesy lamps inoperative from the driver's door? | Go to Step 8 | Go to Step 7
7 | Are the courtesy lamps inoperative from all of the passenger doors? | Go to Step 13 | Go to Step 9
8 |

1. Close all of the vehicle's doors, except the driver's.
2. Disconnect the driver's door ajar switch. Refer to in Doors.
3. Connect a 3 amp fused jumper wire between the driver door ajar switch signal circuit and a good ground.

Do the courtesy lamps illuminate?

Go to Step 14

Go to Step 15

9 |

1. Close all of the vehicle's doors, except the inoperative door.
2. Disconnect the inoperative door ajar switch or door jamb switch. Refer to Door Lock Replacement or Door Jamb Switch Replacement in Doors.
3. Connect a 3 amp fused jumper wire between the appropriate door ajar switch signal circuit and a good ground.

Do the courtesy lamps illuminate?

Go to Step 14

Go to Step 15

10 | Test the courtesy lamp low control circuit 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 21 | Go to Step 17
11 | Test the courtesy lamp supply voltage circuit 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 21 | Go to Step 17
12 | Test the battery positive voltage circuit of the BCM for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 18
13 | Test the passenger door ajar switch signal circuit 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 21 | Go to Step 17
14 | Test the ground circuit of the inoperative door ajar switch or door jamb switch 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 21 | Go to Step 16
15 | Test the inoperative door ajar switch signal circuit 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 21 | Go to Step 17
16 | Inspect for poor connections at the harness connector of the inoperative door ajar switch or door jamb 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 21 | Go to Step 19
17 | 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 21 | Go to Step 20
18 | Repair a short to ground in the courtesy lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | --
19 | Replace the inoperative door ajar switch or door jamb switch. Refer to Door Lock Replacement or Door Jamb Switch Replacement in Doors. Did you complete the replacement? | Go to Step 21 | --
20 | Important: Perform the set up 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 21 | --
21 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3