For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.
1 |

1. Disconnect the release motor connector from the rear compartment lid.
2. Use a DMM in order to measure the resistance between terminal B of the rear compartment lid release motor harness connector and ground.

Does the resistance measure within the specified range?

0-2 ohms

Go to Step 2

Go to Step 3

2 | Connect a fused jumper between terminal A and terminal B of the rear compartment lid release motor harness connector. Does the rear compartment courtesy lamp light? | -- | Go to Step 4 | Go to Step 5
3 | Repair the open in CKT 750 between the rear compartment lid release motor and ground splice pack G401. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
4 | Replace the rear compartment lid release motor. Refer to Rear Compartment Lid Release Motor in Body Rear End. Is the repair complete? | -- | Go to Interior Lamps System Check | --
5 |

1. Reconnect the rear compartment lid release motor connector.
2. Open the rear compartment lid.
3. Disconnect the rear compartment courtesy lamp connector.
4. Use the DMM in order to measure the resistance between terminal B of the rear compartment courtesy lamp connector and ground.

Does the resistance measure within the specified range?

0-2 ohms

Go to Step 6

Go to Step 7

6 | Use the DMM in order to measure the voltage between terminal C of the rear compartment courtesy lamp connector and ground. Does the voltage measure to the specified value? | B+ | Go to Step 8 | Go to Step 9
7 | Repair the open in CKT 737 between the rear compartment courtesy lamp and the rear compartment lid release motor. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
8 | Replace the rear compartment courtesy lamp. Refer to Rear Compartment Courtesy Lamp in Body Rear End. Is the repair complete? | -- | Go to Interior Lamps System Check | --
9 | Use the DMM in order to backprobe the left IP junction block. Measure the voltage between terminal C3 of connector C3 and ground. Does the voltage measure to the specified value? | B+ | Go to Step 10 | Go to Step 11
10 | Repair the open in CKT 1732 between the left IP junction block and the rear compartment courtesy lamp. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lamps System Check | --
11 | 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 | --