GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Firebird 🢒 Body and Accessories 🢒 Body Rear End 🢒 Courtesy Lamps Always On

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2
  1. Turn the ignition to the OFF position.
  2. Ensure that all of the doors are closed.
  3. Ensure that the rear compartment lid is closed.
  4. Ensure that the IP dimmer switch is in the off position.
  5. Ensure that the vehicle has not recently been unlocked using the keyless entry function.
  6. Ensure that the reading lamp switches on the rearview mirror are in the OFF position.

Do the courtesy lamps remain off?

--

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

Go to Step 3

3
  1. Turn the ignition switch to the OFF position.
  2. Close the IP compartment.
  3. Disconnect the body control module (BCM) connector C2 and connector C3.
  4. Connect a test lamp between the BCM connector C2 terminal B and the BCM connector C3 terminal C7. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 4

4

Connect a test lamp between the BCM connector C2 terminal B and the BCM connector C3 terminal D1. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 11

Go to Step 5

5
  1. Close the driver door.
  2. Connect a test lamp between the BCM connector C2 terminal B and the BCM connector C3 terminal D11. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 12

Go to Step 6

6
  1. Close the passenger door.
  2. Connect a test lamp between the BCM connector C2 terminal B and the BCM connector C3 terminal D12. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 14

Go to Step 7

7
  1. Close the rear compartment lid.
  2. Connect a test lamp between the BCM connector C2 terminal B and the BCM connector C3 terminal D13. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 16

Go to Step 8

8

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

--

Go to Step 18

--

9

Test for and repair a short to ground in circuit 175. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground?

--

Go to Step 18

Go to Step 10

10

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the replacement?

--

Go to Step 18

--

11

Repair the short to ground in circuit 156. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

12

Test for and repair a short to ground in circuit 745. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground?

--

Go to Step 18

Go to Step 13

13

Replace the left front side door lock. Refer to Door Lock Replacement in Doors.

Did you complete the repair?

--

Go to Step 18

--

14

Test for and repair a short to ground in circuit 746. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground?

--

Go to Step 18

Go to Step 15

15

Replace the right front side door lock. Refer to Door Lock Replacement in Doors.

Did you complete the repair?

--

Go to Step 18

--

16

Test for and repair a short to ground in circuit 737. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground?

--

Go to Step 18

Go to Step 17

17

Replace the rear compartment lid ajar indication switch. Refer to Liftgate Lock Actuator Replacement in Body Rear End.

Did you complete the replacement?

--

Go to Step 18

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18

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3