Tachometer wire?

[Wes]

Does the tach wire connect to the negative side of coil?

 

[Burntorange70]

Yes it should go on the negative side.

 

[Wes]

Thanks Burnt

 

[cudajim]

Does the tach wire connect to the negative side of coil?

If you hooked it to the positive side the voltage would not vary and you'd never get a signal for the tach so yes it has to hook to the negative side. It's simply looking for a modified pulse waveform to make the tach work.

 

[Wes]

Thank you Jim.

I commend you for tackling all these electrical posts!