For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Fog Lights System Check? | -- | Go to Step 2 | Go to Fog Lights System Check
2 | Do the park lamps operate properly? | -- | Go to Step 3 | Go to Exterior Lights System Check
3 |

1. Place the headlamp switch in the PARK position.
2. Use a J 39200 digital multimeter (DMM) in order to backprobe the fog lamp switch connector between cavity 2 (YEL) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 10

4 | Connect a fused jumper between the fog lamp switch connector cavity 2 (YEL) and cavity 3 (YEL). Do the fog lamps light? | -- | Go to Step 11 | Go to Step 5
5 |

1. Remove the fog lamp enable relay position C from the engine compartment fuse block.
2. Connect the DMM between the fog lamp enable relay position C cavity A9 (YEL) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 12

6 | Connect the DMM between the fog lamp enable relay position C cavity B9 (ORN) and ground. Is the voltage within the specified range? | 10-15 V | Go to Step 7 | Go to Step 13
7 | Connect a fused jumper between the fog lamp enable relay position C cavity B9 (ORN) and cavity A7 (PPL). Do the fog lamps light? | -- | Go to Step 8 | Go to Step 14
8 |

1. Reinstall the fog lamp enable relay position C in the engine compartment fuse block.
2. Disconnect the lamp control module (LCM) connector C1.
3. Connect the fused jumper between the LCM connector C1 cavity A4 (DK GRN/WHT) and ground.

Do the fog lamps light?

--

Go to Step 9

Go to Step 15

9 | Replace the LCM. Is the repair complete? | -- | Go to Fog Lights System Check | --
10 | Repair the open in CKT 32 (YEL) between S279 and the fog lamp switch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Fog Lights System Check | --
11 | Replace the fog lamp switch. Refer to Fog Lamp Switch Replacement . Is the repair complete? | -- | Go to Fog Lights System Check | --
12 | Repair the open in CKT 317 (YEL) between the engine compartment fuse block and the fog lamp switch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Fog Lights System Check | --
13 | Repair the open in CKT 1840 (ORN) between the IP fuse block and the engine compartment fuse block. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Fog Lights System Check | --
14 | Repair the open in CKT 34 (PPL) between the engine compartment fuse block and S124. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Fog Lights System Check | --
15 | Test for an open in CKT 1317 (DK GRN/WHT) between the engine compartment fuse block and the LCM. Refer to Testing for Continuity in Wiring Systems. Is CKT 1317 OK? | -- | Go to Step 16 | Go to Step 17
16 | Replace the fog lamp enable relay position C in the engine compartment fuse block. Is the repair complete? | -- | Go to Fog Lights System Check | --
17 | Repair the open in CKT 1317 (DK GRN/WHT) between the engine compartment fuse block and the LCM. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Fog Lights System Check | --