For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: The windshield header courtesy/reading lamps do not activate when the following conditions exist:

• | The interior courtesy lights are on.

• | The windshield header courtesy/reading lamp switches are on.

• | The interior lamps override switch is on (the interior courtesy lights are enabled).

1 | Did you perform the Interior Lights System Check? | -- | Go to Step 2 | Go to Interior Lamps System Check
2 | Inspect the filament of the windshield header courtesy/reading lamps bulb(s). Is there any bulb filament open? | -- | Go to Step 6 | Go to Step 3
3 |

1. Disconnect the windshield header courtesy/reading lamps electrical connector.
2. Turn the ignition switch from the LOCK position to the RUN position.
3. Turn the instrument panel (IP) dimmer switch to the DOME position.
4. Turn on the interior lamps override switch (the interior courtesy lights are enabled).
5. Use a test lamp in order to connect between the windshield header courtesy/reading lamps harness connector terminal A and ground.

Did the test lamp light?

--

Go to Step 4

Go to Step 7

4 | Use a test lamp in order to connect between the windshield header courtesy/reading lamps harness connector terminal A and B. Did the test lamp light? | -- | Go to Step 5 | Go to Step 8
5 | Use a test lamp in order to connect between the windshield header courtesy/reading lamps harness connector terminal A and C. Did the test lamps light? | -- | Go to Step 9 | Go to Step 10
6 | Replace the windshield header courtesy/reading lamp bulb(s). Refer to Reading Lamp Bulb Replacement - Overhead Console . Did you complete the repair? | -- | Go to Step 11 | --
7 | Repair the following conditions in CKT 328:

• | A poor connection

• | An open

Did you find and correct the conditions?

--

Go to Step 11

--

8 | Repair the following conditions in CKT 650:

• | A poor connection

• | An open

Did you find and correct the condition?

--

Go to Step 11

--

9 | Replace the windshield header courtesy/reading lamps assembly. Refer to Reading Lamp Bulb Replacement - Overhead Console . Did you complete the repair? | -- | Go to Step 11 | --
10 | Repair the following conditions in CKT 690:

• | A poor connection

• | An open

Did you find and correct the conditions?

--

Go to Step 11

--

11 |

1. Turn the ignition switch to the LOCK position.
2. Reinstall any connectors or components that were removed.
3. Turn the ignition switch to the RUN position for 6 seconds.
4. Turn the ignition switch to the LOCK position.
5. Remove the BCM PRGRM fuse.
6. Turn the ignition switch to the ACC position.

The BCM sounds the chime the number of times equivalent to the BCM type installed on the vehicle.

7. Within 1 second, turn the ignition switch from the ACC position to the LOCK position, then back to the ACC position.

The BCM sounds any DTCs stored.

Are there any BCM DTCs present?

--

Go to Diagnostic System Check - Body Control System in Body Control System

Go to Interior Lamps System Check