Another TACHOMETER TESTING thread

[Jay Bee]

Maybe I should have piggybacked on the other threads but...oh well.
So, I'm testing my spare 8K tach and I think it's bad BUT I'd like to know if my procedure is sound or if I'm missing something.

Using battery's negative to tach's case(ground).
Using battery's positive to tach's power post.
Using coil's negative to tach's spade connector.
The car has Mopar Electronic Ignition w/black ECU and obviously running and revving the engine during the test.

If the tach was good, would doing the above work?
FYI: the tach in the car works fine, it was converted to the RTE board and it was disconnected for the test - just because

[Bullitt-]

  Sounds correct to me....

[Jay Bee]

  Sounds correct to me....

Thanks for the confirmation.

I really thought the tach was good and expected to see some movement. That's what got me second guessing the procedure. I also read that "fender" testing like that won't work with an MSD ignition, that's why the Mopar Electronic Ign mention.

[dodj]

  Sounds correct to me....

Thanks for the confirmation.

I really thought the tach was good and expected to see some movement. That's what got me second guessing the procedure. I also read that "fender" testing like that won't work with an MSD ignition, that's why the Mopar Electronic Ign mention.

To work with the MSD, you would need to use their tach adapter as well I think.

[Caparco]

That's only if you're using the msd ignition box not just a coil that adapter only works with the msd ignition box