Doug, what are you trying to accomplish?
I dont think the Ford tach takes its signal directly from the coil.
Generally...getting the tach to work right with a Petronix ignior.
Getting specific information from others is dental surgery...pulling teeth.
Key details are always emmitted.
At the moment, I am down to connecting the resistance wire to the coil. I don't remember specifically what the pigtail on that wire to the coil + terminal looked like.
IF this service part is the same as production line then there is a pigtail required to connect to the coil? Maybe it's different then production?
I'm thinking it was a white wire with a molded female bullet on one end and a 90 molded push on post terminal on the other? I don't have any pictures of that detail.
The Ford Service part has male bullet ends at either end. One is very thick. One thin. I think the thin one goes to the tach output?
I think the fat one connects to the coil pigtail and just lays on the intake manifold?
Hearing from several here running a similar set up, the wiring plan of leaving the resistance wire in place from the tach to the coil, and running a seperate ignition switched 12v wire to the coil holds the most hope of success.
My original resistance wire was cut out years ago, so I'm rewiring from scratch, so to speak.
Again, what does that coil end pigtail look like? Anyone have a picture?
I do remember the discussion Pete habout the replacement yellow top coils vaguely since I wasn't running that set up but is a consideration right now.
A high likeliness of a melted coil is not a big selling point but that coil just came up in a Google search this morning and refreshed my memory a little with blurry details?
Hey. It's the same for me as it was eons ago. If I had instant technical recall, I could have been smart? Sometimes I misspell my own name? NOT a big plus on my part.