sgtjd
Well-known member
When I purchased this 73 Mach the tach wasn't working. All other gauges working. Trying to figure out where to start. It does have a pertronix I device under the distrbutor. All wires seem to be in place. Its a matter of tracing the wire back thru the firewall and see where it goes. What else can I check or do some wire from point a to point b to see if the tach is working at all. Please advise with text and pictures.