For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Interior Lamps System Check? | -- | Go to Step 2 | Go to Interior Lamps System Check
2 |

1. Inspect the body control module (BCM) for DTCs.
2. Correct any of the current codes set. Refer to Diagnostic Trouble Code (DTC) List/Type in Body Control System.

Is the diagnostic check complete?

--

Go to Step 3

Go to Step 4

3 | Backprobe the BCM connector C2 using a J 39200 DMM and measure the voltage between terminal B1 and ground. Is the voltage measured to the specified value? | B+ | Go to Step 5 | Go to Step 6
4 | Perform the BCM system check. Refer to Body Control Module System Check in Body Control System. Is the repair complete? | -- | Go to Interior Lamps System Check | --
5 |

1. Open the left front door.
2. Backprobe the BCM between terminal A11 of connector C3 and terminal B1 of connector C2 using a J 39200 DMM and measure the voltage.

Is the voltage measured to the specified value?

B+

Go to Step 7

Go to Step 9

6 | Backprobe the BCM connector C3 using a J 39200 DMM and measure the voltage between terminal A12 and ground. Is the voltage measured to the specified value? | B+ | Go to Step 9 | Go to Step 8
7 | Backprobe the left IP junction block connector C2 using a J 39200 DMM and measure the voltage between terminal C9 and ground. Is the voltage measured to the specified value? | B+ | Go to Step 10 | Go to Step 11
8 | Backprobe the right IP junction block connector C1 using a J 39200 DMM and measure the voltage between terminal A2 and ground. Is the voltage measured to the specified value? | B+ | Go to Step 12 | Go to Step 13
9 | Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Is the repair complete? | -- | Go to Interior Lamps System Check | --
10 | Backprobe the left IP junction block connector C1 using a J 39200 DMM and measure the voltage between terminal E4 and B+. Is the voltage measured within the specified range? | -- | Go to Step 14 | Go to Step 15
11 | Repair the open in CKT 1732 between the BCM and the left IP junction block. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
12 | Repair the open in CKT 340 between the right IP junction block and the BCM. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
13 | Replace the right IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
14 | Replace the left IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
15 | Repair the open in CKT 156 between the BCM and the left IP junction block. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --