Anyone know how to fix the temp and compass on the rear view mirror? Mine freaks out when the temp outside gets over 80. it works for about 5 mins after starting the truck the just goes blank or flashes. I'm getting ready for my engine, transmission, rear end swap later this month and would like to fix this too.

 

had an issue with mine once, it would blank out when truck was hot in summer. Discovered the add a circuit fuse jobber I had installed had a little corrosion built up on it.