Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Lighting Systems Diagnostic System Check? | -- | Go to Step 2 | |
2 | Verify that the backup lamps are inoperative. Do the backup lamps operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Inspect the VEH B/U fuse in the underhood fuse block. Is the fuse open? | -- | Go to Step 4 | Go to Step 5 |
4 | Inspect and replace any B/U lamp bulb or socket that is shorted internally If no bulb/socket problem is found, locate and repair short to ground in CKT 1324 (LT GRN). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
5 | Inspect the B/U LP 25A fuse in the underhood fuse block. Is the fuse open? | -- | Go to Step 6 | Go to Step 9 |
6 | Disconnect the backup lamp switch (M/T) or the park/neutral position switch (A/T) and use the J 39200 Digital Multimeter (DMM) to test for continuity to ground in CKT 839 (PNK). Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 7 | Go to Step 8 |
7 | Locate and repair the short to ground in CKT 839 (PNK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
8 | Locate and repair the short to ground in CKT 1524 (GRY). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
9 |
Is voltage present? | B+ | Go to Step 14 | Go to Step 10 |
10 | Disconnect the harness from the backup lamp switch (M/T) or the park/neutral position switch (A/T) and use the J 39200 DMM to check CKT 839 (PNK) for voltage. Refer to Circuit Testing in Wiring Systems. Is voltage present? | B+ | Go to Step 12 | Go to Step 11 |
11 | Locate and repair the open or high resistance in CKT 839 (PNK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
12 | Reinstall the backup lamp bulbs and connect a fused jumper between CKT 839 (PNK) and CKT 1524 (GRY). Do the backup lamps light? | -- | Go to Step 13 | Go to Step 17 |
13 | Adjust or replace the backup lamp switch (M/T) or the park/neutral position switch (A/T). Refer to Park/Neutral Position Switch Adjustment or Park/Neutral Position Switch Replacement in Automatic Transmission. Is the repair complete? | -- | Go to Step 18 | -- |
14 | Use the J 39200 DMM to test for continuity to ground in CKT 1750/2250 (BLK) at either B/U lamp socket. Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 15 | Go to Step 16 |
15 | Locate and repair open or high resistance in CKT 1324 (LT GRN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
16 | Locate and repair open or high resistance in CKT 1750/2250 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
17 | Locate and repair the open or high resistance in CKT 1524 (GRY). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 18 | -- |
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
