Interior Lamps Dimming

The second group includes lamps which may be dimmed. This group may use a combination of vacuum fluorescent (VF) illumination, incandescent lamps and pulse width modulation (PWM) illumination.

• The Hazard Switch
• The Door Switches and the Window Switches
• The Steering Wheel Controls
• The HVAC Control Head Assembly
• The Ignition Switch
• The Radio
• The Rear Compartment/Fuel Door Release Switch
• The Traction/Suspension Control Switch
• The Power Seat Switch
• The PRNDL
• The Power Sun Roof Switch
• The Fog Lamp Switch
• The Front and Rear Fog Lamp Switch (Export)

When the ignition switch is turned to the ON position, the vacuum fluorescent (VF) displays, for radio and HVAC control assembly, the incandescent lamps and the PWM lamps turn ON at maximum brightness. When the park lamps are ON and the ambient light sensor indicates low light conditions, all back lighting turn ON at the dimming level indicated by the IP dimmer switch. At the same time all VF displays dim in order to match the indicated dimming level. When the headlamp switch is placed in the PARK position, the BCM energizes the park lamp relay coil control circuit and dims the interior lamps to the dimming level indicated by the IP dimmer switch. When the driver selects a dimming setting by moving the IP dimming switch potentiometer, all back lighting lamps are provided with a specific voltage. When the IP dimmer switch is moved from MIN to MAX, all VF displays and all back lighting respond from minimum intensity to maximum brightness in response to the IP dimmer switch.

The driver may select parade mode by manually turning on the park lamps during daylight conditions.