78' Mustang II Mach 1 instrument Cluster Issues

[gomez]

We recently started trying to find out the problem with the cluster and when you turn on your left blinker your tach needle shoots up and comes down and so on. and the car has to be on in order for it to do this but the cars idle doesnt change and also when the blinker blinks the right blinker flashes oppositely along with the headlamps light. With the right blinker only the left blinker flashes and headlamps light. all this only happens on the instrument cluster. cosmetically all the might work no issue. We Believe it is a problem with a bad ground? Any Ideas? Anyone? hit me back were stuck. Greatly Appreciated.

[dee_saleen]

Sounds like a bad ground, Which is never fun to find!

[gomez]

Well we are in the process of checking the chance that maybe a the wiring in the fuse block is reversed and that could be a long process. along with checking Every Single Ground! well just thought i would try to get someone else's opinion. thanks

[gomez]

i might of found one of the cluster's grounds but when ever i turn on the parking lights the right blinker in the instrument cluster still stays solid (its not blinking cause we removed both flasher units). so looks like back to the drawing board.