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Switch - Panel Dimmer
Special Tool(s)
Radio Removing Tool
T87P-19061-A
Removal
Disconnect the battery ground cable
Pull out the radio using Radio Removing Tool.
Remove the radio.
Disconnect the electrical connectors.
Disconnect the antenna cable.
Remove the radio.
Remove the instrument panel finish panel bolts.
Remove the instrument cluster finish panel bolts.
Pull out and position aside the instrument cluster finish panel.
Disconnect the electric clock electrical connector.
Remove the instrument cluster finish panel.
Disconnect the headlight switch electrical connector.
Disconnect the dimmer switch electrical connector.
Remove the instrument cluster finish panel.
Remove the dimmer switch.
Remove the screws.
Remove the dimmer switch.
Installation
NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 mi) or more to relearn the strategy.
To install, reverse the removal procedure.
You probably have a bad ground in the electronic instrument cluster, or cluster connection to wiring harness. I would recomend you have a qualified auto tech diagnose it. It is not a easy fix.
it's got to be a fuse unless by some bad fluke the light bulbs themselves have gotten damaged. Bad wires too maybe. only thing I can think of if it's not a fuse. Sorry
automatic headlights are controlled by a photo sensor on the dash located in front of the Instrument cluster. to test the sensor try covering it and see if the headlights come on. faulty wiring in the circuit could also cause this problem. the headlights and the radio are wired together and the "auto" function will cause the radio to get brighter when its dark out, thus the combination of problems.
Well...lets start with the obvious. Check fuses and NEVER piggyback any stereo or security stuff into their fuses...you dont want the lights to shut down during a night drive!! Check under the hood for a relay center...also has some fuses there as well.
The Daytime Running Lamps are a "straight through wiring configuration". Doubt it even goes through a headlight switch at all. But the regular lights do. Unless you've worked on the front of the car and forgot to plug the headlights back in, do this... Turn the light switch on...looking at the instrument cluster , can you make the high-beam-indicator light come on? As you rotate the headlight switch knob...does the instrument panel lights brighten or dim? You probably have a faulty headlight switch...auto stores have them...they simply plug in.
possibly the dimmer switch on the floor? happened on my 91 half ton dims didnt work but brights did and then they cut out altogether. a little water goes a long way
Radio Removing Tool 
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