Step
| Action
| Normal Result(s)
| Abnormal Result(s)*
|
1
| Turn the ignition switch
to the RUN position.
| The following VF displays light:
| • | The heater and A/C programmer |
| • | The passenger temperature control |
|
Vacuum Fluorescent Display Inoperative - Heater and Air Conditioning (A/C) Control
|
2
| Place the
headlamp switch in the PARK position.
| The above VF displays dim and the following interior lamps
light at the current dimming level:
| • | The door handle flood lamps (Buick) |
| • | The door switch flood lamps (Buick) |
| • | The fog lamp switch (Oldsmobile) |
| • | The headlamp switch (Buick) |
| • | The heater and A/C control |
| • | The panel dimming switch (Oldsmobile) |
| • | The passenger temperature control |
| • | The power mirror switch (Oldsmobile) |
| • | The power window switches (Oldsmobile) |
| • | The PRNDL lamps (Buick) |
| • | The release switch (Oldsmobile) |
| • | The seat switches (Oldsmobile) |
| • | The seat/lock switches (Oldsmobile) |
| • | The shift select switch lamp (Oldsmobile) |
| • | The steering wheel controls |
| • | The traction control switch (Oldsmobile) |
| • | The trip odometer reset switch (Buick) |
|
|
3
| Operate
the dimming switch in both directions, through the full range of the switch.
| In one direction,
the lamps become dim. In the other direction, the lamps become bright.
|
|
* Refer to the appropriate symptom diagnostic table for
the applicable abnormal result.
|
