1991 Si no gauge modifications
Tail/Tag lights work and fuses are good
All idiot lights work along with top two gauge bulbs but NONE of the gauge back light bulbs or the vent position buttons on climate control light up. Climate lights have been know to come on about twice per year lol


Two questions:

If the two lights on the very top of my gauge cluster ARE working but the rear gauge illumination lights are NOT working, does that automatically mean the Brightness Control Module is good or are they a different circuit.

If it's bad, does anyone know where to obtain a new replacement i.e. not used?

Thanks!

 

yeah sounds like your dimmer is bad. check ebay for a new one. also might have to change the bulbs in he climate control those are known for going as mine did.