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 | Do the courtesy lamps stay illuminated beyond the 25 second timeout? | -- | Go to Step 10 | Go to Step 2 |
2 |
Does the resistance measure within the specified range? | 0-2 ohms | Go to Step 3 | Go to Step 4 |
3 | Use a testlamp connected to ground in order to probe between the A terminal of the courtesy lamp connector and ground. Does the testlamp light? | -- | Go to Step 5 | Go to Step 6 |
4 | Use the DMM in order to backprobe the left IP junction block connector C2 and measure the resistance between the C3 terminal and ground. Does the resistance measure within the specified range? | 0-2 ohms | Go to Step 9 | Go to Step 8 |
5 | Replace the inoperative courtesy lamp. Refer to Dome and Reading Lamp Bulb Replacement Is the repair complete? | -- | -- | |
6 | Use a testlamp connected to ground in order to backprobe the left IP junction block connector C1 terminal E9 (inoperative left lamp) or connector C2 terminal C9 (inoperative right lamp). Does the testlamp light? | -- | Go to Step 7 | Go to Step 8 |
7 | Repair the open in CKT 1732 between the left IP junction block and the courtesy lamp connector. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
8 | Replace the left IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | -- | |
9 | Repair the open in CKT 156 between the left IP junction block and the courtesy lamp. Refer to Relay/Fuse Center Replacement . Is the repair complete? | -- | -- | |
10 | Repair the short to ground in CKT 156 between the BCM and the courtesy lamps. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
