My temp gauge is not working properly. Somtimes it will give the temp other times it will drop to 100. Occasionally I'll see it move around and then drop again.

Also, I noticed when my turn signals are on the tach and volt gauge bounce around slightly, whats up with that?
The tach also moves when my Brake loghts are on or if I'm using my power windows. When I use the windows the engine also sounds like the rpms dropped slightly.

 

check grounds on back of instrument panel and also check connection of dark green wire on your temp sending unit screwed into the engine block,
sounds like some housecleaning/hardware tightening is in need for the dash,
something i need to do on mine,., tach works one week and is all looney the next week, and temp guage pegs way out bad on engine crank and other things are funky,.

good luck

 

Thanks a lot Fast68.