Got an alarm installed (and removed). As soon as the install was done my tach wouldn't work and my oil, washer, and tail light warning lights came on. Of course the shop is denying any responsibility so I'm stuck fixing it. All fuses and connectors look good. Every once in awhile the tach kicks on and the lights go out for a few seconds. Any ideas?

 

could be loose connection in the back of the cluster... like its one clip that should be clicked on good right where the tach is... thatsexactly what it sounds like with my 95 tercel was and everything was good but sometimes it would get loose again and i would care less as long as the gas guage and rpm worked haha i dont drive that fast n e way so lol

 

sounds like loose wire/plug.

did they try to do remote start? is that why they mess with the tach?