OK, I have installed hundreds of Tachs over the years, pretty simple actually, 3 wires (4 for lighting), one to ground, one to 12V switched, and the third (green) to the (-) side of the coil. Can someone please explain to me why I get no tach signal unless I connect it to the (+) side of the coil, very strange. I have also checked it with my diagnostic equip, and I only get the signal from the (+), so that rules out a defective Autometer Tach. Now, it all works fine, but it shouldn't, so that is my question, do you know why?
Specs:
'68 340 Cuda
Updated ign to MP Elect. Ign
Coil seems to be original (Should that be changed???)
Car purchased 1 1/2 months ago, as is, so I'm finding things out day by day.
Thanks for your help.
Specs:
'68 340 Cuda
Updated ign to MP Elect. Ign
Coil seems to be original (Should that be changed???)
Car purchased 1 1/2 months ago, as is, so I'm finding things out day by day.
Thanks for your help.
