[timbergrove]

Need some advise, please. I have completed a restoration on my 65 gto. Most everything is fine except the tach does not work now. I don't know if I broke it during the resto or if it is just not compatible with the new Pertronix Ignitor electronic ignition and coil that I installed. I checked the wiring. I eliminated the resistance wire to the coil per Pertronix manual. I hope that did not destroy the tach. The needle is stuck around 1000 rpm all the time and does not move when the engine runs. The needle bounces a little if I tap the tach. The tach case is at ground potential and the lead checks out to the coil.

Before I replace it, is there a test I can do to prove it is bad? Replacing it is a mean job for a big guy like me. I'd hate to put in another one only to find it was not the problem. Any advise or in-car tests would be appreciated.

Thanks.

Bob

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