Ive been having problems with all my gauges and headlights in my 86 berlinetta. None were working correctly. Also any time i would push the brakes all gauges would lose power and my headlights would come on. After going through wiring trying to track down grounds etc... i pulled out the gauge cluster on my other 86 and switched them out. After doing so everything is now working correctly. I could not believe the circuits on the back of the clusters could cause that many problems. Anyways just a heads up to someone who might have the same problems i was having.