67 camaro tach quits
 

working on a 67 camaro rs tach and gauge car when we turn the headlights on the tach quits working ??

I would check the ground wires related to the light circuit. Does it quit if only the parking lights are on?

As my Dad would say,turn the headlights off.. :)

And the instrument cluster ground.

thats it was the ground at the cluster thanks