Schematic Reference: Interior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Verify that the courtesy/dome lamps are always ON.

Do the courtesy/dome lamps operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Test for a short to voltage on the courtesy lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 4

1. Ensure that the instrument panel lamp dimmer switch is in the minimum brightness position.
2. Inspect for the following related body control module (BCM), driver door switch, and passenger door switch data parameters. Refer to Scan Tool Data List and Scan Tool Data Definitions for typical values and definitions:

•	Ctsy. Lamp Actv. Reason

•	Driver Door Open Sw.

•	Passenger Door Open Sw.

Was a problem found?

Go to Step 5

Go to Step 9

Disconnect and test the switches of the affected input circuit for proper continuity in the open and closed positions. Refer to Testing for Continuity .

Is continuity correct in both positions?

Go to Step 6

Go to Step 7

Test the signal circuits of the affected input switches for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 8

Inspect for poor connections at the harness connector of the affected switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 10

Inspect for poor connections at the harness connector of the module in the affected circuit. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 11

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 12

Replace the malfunctioning switch in the affected circuit.

Did you complete the replacement?

Go to Step 13

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Replace the module in the affected circuit. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 13

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Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 13

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3