The headlamp and the instrument panel (IP) lamp dimmer
switch control the brightness of the incandescent lamps and the vacuum fluorescent
(VF) displays. The incandescent lamps are located in various components (see
schematics).
The VF display is located in the following components:
| • | The driver information display (if equipped) |
| • | The radio rear speaker amplifier (if equipped) |
Incandescent Dimming
The brightness of the incandescent lamps is determined by a variable
voltage signal produced by the headlamp and the IP lamp dimmer switch through
CKT 8.
Vacuum Fluorescent (VF) Dimming
The brightness of the VF display is controlled by the following 2 signals:
| • | The park lamp signal (CKT 9) |
| • | The VF dim signal (CKT 308) |
With the park lamps activated, the following components will dim for
night time viewing:
| • | The VF display of the radio |
| • | The driver information display (if equipped) |
| • | The radio rear seat audio control (if equipped) |
When the park lamps ON signal is not present, (park lamps are in the
OFF position), the VF display is at its high brightness for daytime viewing.
The headlamp and the (IP) lamp dimmer switch provide a dimming signal through
CKT 308. This controls the brightness of the VF display when the headlamp
and the IP lamp dimmer switch is adjusted.
Daytime Running Lamp (DRL) Dimming
When the DRL module has the headlamps ON (in night mode) and the park
light switch is OFF, voltage is fed back to the headlamp switch assembly through
CKT 9. This allows the dimming circuits to function as stated above.
