Forum Discussion

Pogoil's avatar
Pogoil
Explorer
Jan 26, 2016

1995 Beaver Where does the tach get its signal from.

The tachometer.on my motor home is erratic at times. Alternator is working correctly. Cummins 6cta 8.3 mechanical.
Thanks,

Pogoil.
  • Some motorhomes of that era got the tach signal from the alternator. I just replaced my alternator with a different model ( new one = Delco Remy 28SI) and it has a separate terminal designated for use to drive a tach.

    Fred
  • Don't know for a fact but most tachs of that era were getting signal from the coil or distributor. If your engine has a HEI distributor it can affect the tach operation.