SCHEMATIC REFERENCE: Interior Lights Schematics

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Important:: The ambient light sensor must indicate low light conditions for the interior lamps to operate.

1. Install a scan tool.
2. Observe the ambient light sensor input in the instrument panel module (IPM) (w/CJ2) or climate control panel (CCP) (w/C67) data list.
3. Cover the ambient light sensor with a dark towel or piece or card board.

Does the Ambient Light Sensor input voltage change?

Go to Step 3

Go to Twilight Sentinel Inoperative

With a scan tool command the Courtesy Lamp #1,#2 w/o dim output ON.

Do all of the interior courtesy lamps turn ON?

Go to Step 5

Go to Step 4

Are all of the interior courtesy lamps inoperative?

Go to Step 13

Go to Step 17

1. Position the interior lamp switch to ON.
2. With a scan tool, observe the Interior Lamp Switch parameter in the instrument panel module (IPM) (w/CJ2) or climate control panel (CCP) (w/C67) data list.

Does the scan tool display ON?

Go to Step 6

Go to Step 7

1. Install a scan tool.
2. Open all the doors.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool, observe all the Door Jamb Sw. input parameters in the drivers door module (DDM) data list.

Does the scan tool display ON for all the door jamb sw. inputs?

Go to Step 33

Go to Step 10

1. Disconnect the fog lamp switch.
2. Connect a fused jumper between the interior lamp switch on circuit and the interior lamp switch ground circuit.
3. With a scan tool observe the Interior Lamp Switch parameter.

Does the scan tool display ON?

Go to Step 29

Go to Step 8

Test the interior lamp switch on circuit for high resistance, open or short to power. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 9

Test the interior lamp switch ground circuit for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 37

Go to Step 31

1. Turn OFF the ignition.
2. Disconnect the inoperative door lock actuator.
3. Connect a fused jumper between the door lock actuator input circuit and the door lock actuator ground circuit of the inoperative door lock actuator.
4. Turn ON the ignition, with the engine OFF.
5. With a scan tool, observe the inoperative Door Jamb Sw. input parameter.

Does the scan tool display ON for the inoperative door jamb sw. input?

Go to Step 25

Go to Step 11

Test the inoperative door lock actuator input 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 37

Go to Step 12

Test the inoperative door lock actuator ground circuit for an open or short to power. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 27

1. Turn OFF the ignition.
2. Disconnect the interior lamp relay.
3. Turn ON the ignition, with the engine OFF.
4. Probe the interior lamp relay coil side feed circuit with a test lamp that connected to a good ground.

Does the test lamp illuminate?

Go to Step 14

Go to Step 22

Probe the interior lamp relay switch side feed circuit with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 15

Go to Step 21

1. Connect a test lamp between the interior lamp relay coil side feed circuit and the interior lamp relay control circuit.
2. With a scan tool command the Courtesy Lamp #1,#2 w/o dim output ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 16

Go to Step 20

1. Connect a fused jumper between the interior lamp relay switch side feed circuit and the interior lamp feed circuit at the interior lamp relay connector.
2. With a scan tool, command the Courtesy Lamp #1,#2 w/o dim ON.

Do the interior lamps illuminate?

Go to Step 23

Go to Step 18

1. Turn ON the courtesy lamps.
2. Remove the inoperative courtesy lamp bulb.
3. Connect a test lamp between the inoperative courtesy lamp bulb feed circuit and the ground circuit of the inoperative courtesy lamp bulb.

Does the test lamp illuminate?

Go to Step 35

Go to Step 18

Test the interior lamp feed 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 37

Go to Step 19

Test the interior lamp ground circuit for an open or short to battery positive voltage (B+). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 33

Test the control circuit of the interior lamp relay for high resistance, an open or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

Go to Step 33

Repair the open or high resistance in the switch side feed circuit of the interior lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 37

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Repair the high resistance or open in the coil side feed circuit of the interior lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 37

--

Inspect for poor connections at the interior 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 37

Go to Step 24

Replace the in interior lamp relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the replacement?

Go to Step 37

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Inspect for poor connections at the connector of the inoperative door lock actuator. 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 37

Go to Step 26

Replace the inoperative door lock actuator. Refer to Front Side Door Latch Replacement or Rear Side Door Latch Replacement in Doors.

Did you complete the replacement?

Go to Step 37

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Inspect for poor connections at the connector of the inoperative door 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 37

Go to Step 28

Replace the door control module. Refer to Door Control Module Replacement in Doors.

Did you complete the replacement?

Go to Step 37

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Inspect for poor connections at the connector of the fog 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 37

Go to Step 30

Replace the fog lamp switch. Refer to Fog Lamp Switch Replacement .

Did you complete the replacement?

Go to Step 37

--

Inspect for poor connections at the connector of the IPM (w/CJ2) or the CCP (W/C67). 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 37

Go to Step 32

Replace the IPM (W/CJ2) or CCP (W/C67). Refer to Instrument Panel Module Replacement in Body Control System or Control Assembly Replacement in HVAC Systems - Manual.

Did you complete the replacement?

Go to Step 37

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Inspect for poor connections at the connector of the rear integration module (RIM). 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 37

Go to Step 34

Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 37

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Inspect for poor connections at the inoperative courtesy lamp bulb connector. 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 37

Go to Step 36

Replace the inoperative courtesy lamp bulb.

Did you complete the replacement?

Go to Step 37

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Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2