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 |
Are all of the code setting conditions corrected? | -- | Go to Step 2 | Go to Step 12 |
2 |
Do the headlamps light? | -- | Go to Step 12 | Go to Step 3 |
3 | Backprobe the turn/headlamp switch assembly with a test lamp between terminal 36 of connector C1 and ground. Does the test lamp light? | -- | Go to Step 4 | Go to Step 5 |
4 |
Do the headlamps light? | -- | Go to Step 6 | Go to Step 7 |
5 | Replace the turn/headlamp switch assembly. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column-Standard. Is the repair complete? | -- | -- | |
6 | Replace the faulty relay. Is the repair complete? | -- | -- | |
7 | Backprobe the underhood junction block with a test lamp between terminal B3 of connector C3 and ground. Does the test lamp light? | -- | Go to Step 8 | Go to Step 9 |
8 | Backprobe the underhood junction block using a J 39200 DMM and measure the resistance between terminal A10 of connector C3 and ground. Is the resistance measured within the specified range? | 0-2 ohms | Go to Step 10 | Go to Step 11 |
9 | Repair the open in CKT 306 between the underhood junction block and the turn/headlamp switch assembly. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
10 | Backprobe the underhood junction block with a fused jumper between terminal A9 of connector C3 and ground. Do the headlamps light? | -- | Go to Step 12 | Go to Step 13 |
11 | Repair the open in CKT 150 between the underhood junction block and ground splice pack G201. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
12 | Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | -- | |
13 | Replace the underhood junction block. Refer to Underhood Fuse Block Replacement in Engine Electrical. Is the repair complete? | -- | -- | |
