testing a 65 rally pac tach

[napaguy]

Any way to bench test a 65 rally pac tach? TIA

 

[Midlife]

Not really. The input is a transformer, so unless you have the equipment necessary to drive the tach with simulated ignition signals, it just ain't a gonna work well. In fact, you can easily blow it out. You can try to measure resistance across the leads, but that's all I would do. You should see a very low resistance on DC signals. It's really designed to be an AC meter, and there's not a good way to measure AC resistance with standard tools available around the house or shop.

 

[napaguy]

Thanks mid