For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Interior Lights Dimming System Check? | -- | Go to Step 2 | Go to Interior Lights Dimming System Check
2 | Visually inspect the SWITCH fuse in the steering column fuse holder. Is the SWITCH fuse OK? | -- | Go to Step 3 | Go to Step 7
3 |

1. Place the headlamp switch in the PARK position.
2. Set the interior dimming to the brightest level.
3. Backprobe the connector C202 with a DMM from cavity A2 (GRY) to ground.

Is the voltage greater than the specified value?

8V

Go to Step 4

Go to Step 9

4 | Backprobe the connector C202 with a DMM from cavity A2 (GRY) to cavity A14 (BLK). Is the voltage greater than the specified value? | 8V | Go to Step 5 | Go to Step 10
5 |

1. Disconnect the steering wheel controls connector.
2. Connect a DMM from the steering wheel controls connector cavity B to cavity D.

Is the voltage greater than the specified value?

8V

Go to Step 6

Go to Step 11

6 | Inspect the steering wheel controls connector for the proper terminal contact. Refer to Testing for Electrical Intermittents in Wiring Systems. Is the steering wheel controls connector OK? | -- | Go to Step 14 | Go to Step 12
7 | Repair the short to ground in the steering column wiring between the steering column fuse holder and the inflatable restraint steering wheel module coil. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 8 | --
8 | Replace the SWITCH fuse in the steering column fuse holder. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
9 | Repair the open in CKT 8 (GRY) between S244 (Oldsmobile and Buick) or S291 (Pontiac) and C202. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
10 | Repair the open in CKT 1250 (BLK) between S225 and C202. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
11 | Inspect the connector C202 for the proper terminal contact. Refer to Testing for Electrical Intermittents in Wiring Systems. Is connector C202 OK? | -- | Go to Step 13 | Go to Step 12
12 | Repair the suspect terminals. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
13 | Replace the inflatable restraint steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in SIR. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --
14 | Replace the steering wheel controls. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column - Tilt. Is the repair complete? | -- | Go to Interior Lights Dimming System Check | --