Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Backup Lights System Check? | -- | Go to Step 2 | Go to Backup Lamp System Check |
2 |
Is battery voltage measured? | -- | Go to Step 3 | Go to Step 7 |
3 | Connect a fused jumper from the reverse relay connector cavity D3 (ORN) to cavity C1 (LT GRN). Do the backup lamps light? | -- | Go to Step 4 | Go to Step 8 |
4 | Measure the voltage to ground at the reverse relay connector cavity D1 (ORN). Is battery voltage measured? | -- | Go to Step 5 | Go to Step 7 |
5 |
Do the backup lamps light? | -- | Go to Step 6 | Go to Step 11 |
6 | Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control Systems. Is the body control module replacement complete? | -- | Go to Backup Lamp System Check | -- |
7 | Repair the open in CKT 1940 (ORN) between S434 and the rear compartment relay center 5. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Backup Lamp System Check | -- |
8 |
Does the LH backup lamp light? | -- | Go to Step 9 | Go to Step 10 |
9 | Repair the open in CKT 1150 (BLK) between S425 and G402. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Backup Lamp System Check | -- |
10 | Repair the open in CKT 24 (LT GRN) between the rear compartment relay center 5 and S426 (DeVille) or the left backup lamp (Eldorado) or S414 (Eldorado: Export). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Backup Lamp System Check | -- |
11 |
Is the resistance less than the specified value? | 5ohms | Go to Step 12 | Go to Step 13 |
12 | Replace the reverse relay. Is the reverse relay replacement complete? | -- | Go to Backup Lamp System Check | -- |
13 | Repair the open in CKT 646 (DK GRN) between the rear compartment relay center 5 and the PZM. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Backup Lamp System Check | -- |
