The instrument light dimmer switch doesn't dim anymore, the result being the instrument panel and and dashboard lights look as bright as Vegas at night. Needing know how to remove the switch from the dashboard. It's looks like the dimming switch is behind the dashboard and not one that you can carefully pry out.
Is there and easy fix to remove it, or does the dashboard need to be taken out. If I need to remove the dash maybe I should buy some shades instead ;-)
Any help appreciated.
Thanks Dave
Interior Lamps Dimming
The third group includes lamps which may be dimmed. This group may use a combination of vacuum fluorescent (VF) illumination and incandescent lamps.
Automatic transmission controller indicator lamp switch Automatic transmission preference switch Front fog lamp switch Headlamp leveling switch (Export) HVAC control head assembly Inflatable restraint IP module switch Instrument panel cluster (IPC) Radio and remote tape/CD player Rear fog lamp switch (Export) Rear wiper/washer and endgate/liftgate window release switch Rear window defog switch Steering wheel radio controls Transfer case shift control switch Overhead driver information display module
When the ignition switch is turned to the ON position, the radio and driver information display module vacuum fluorescent (VF) displays turn on at maximum brightness. When the park lamps are on, all incandescent backlighting turn on at the dimming level indicated by the IP dimmer switch. At the same time, all vacuum fluorescent (VF) displays are controlled by the BCM to match the indicated IP dimmer switch dimming level. Battery positive voltage is supplied from the PARK LP fuse in the underhood fuse block to the headlamp and panel dimmer switch and to the ILLUM and STR WHL ILLUM fuses located in the IP fuse block. The IP panel dimmer switch potentiometer receives both its voltage and ground from the headlamp switch and is also an input to the BCM. When the driver selects a dimming setting by moving the IP dimming switch potentiometer, all incandescent backlighting lamps are provided with a specific voltage. The incandescent backlighting lamps are then grounded at G200, G203 and G206. When the IP dimmer switch is moved from MIN to MAX, all vacuum fluorescent (VF) displays, as well as all incandescent backlighting respond from minimum intensity to maximum brightness in response to the IP dimmer switch.
Document ID# 527620
2001 GMC Truck Envoy - 4WD--------------------------------------------------------------------------------
Instrument Panel (I/P) Dimmer Switch Replacement
Removal Procedure
Ensure that the headlamp switch is OFF and that the ignition switch is in the LOCK position. Remove the instrument panel accessory trim plate. Refer to Trim Plate Replacement - Instrument Panel (I/P) Accessory . Disconnect the electrical connector. Remove the screws that retain the headlamp switch panel to the instrument panel accessory trim plate. Remove the headlamp switch panel from the instrument panel accessory trim plate.
Installation Procedure
Install the headlamp switch panel to the instrument panel accessory trim plate.
Notice Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Install the screws that retain the headlamp switch panel to the instrument cluster bezel. Tighten Tighten the screws to 1 N·m (9 lb in). Connect the electrical connector. Install the instrument panel accessory trim plate. Refer to Trim Plate Replacement - Instrument Panel (I/P) Accessory .
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