electronic wiring..

[charger72]

I know ive talked about this before on here, but I found a electronic wiring harness for my 72 to convert it over. Should I use it since its a 5 pin, or just go to a junk yard and find a 4 pin and splice it into my harness? I only have to fix a couple wires on the 5 pinner by putting new ends on it. I believe it came out of a 73.

[Plumcrazy]

Other than having an additional wire to connect the five wire harness will work fine.  A four or a five terminal ECU will work in it.

[charger72]

on a fiver wire one, I know the black/yellow stripe wire goes to the - side of coil, what color to the positive? Is it a big brown one? Cause both my trucks have a red wire to the + side.

[Nacho-RT74]

Diagram made by me long time ago and posted on the old thread

Bulkhead conector wiring could not match with your one even is the wiring located on my car ( also a 3rd gen ), but colors ( where was posible ) are the same as originals.

This is the 5 pins wiring... 4 pins is the same but is single ballast resistor. The pin feeded by the secondary resistance on double one doesn't exist on 4 pins module and is just ommited and unhooked. This step was changed for an internal feed by the main souce wire.

[Chryco Psycho]

12v feed is normally light blue with a yellow tracer
9v feed is green with red tracer
black with yellow tracer goes to the coil
the other 2 are for the dist plug

[charger72]

well, got it to run last night. only took a 30minutes to switch it over. It runs alot better, plus I found a messed up plug wire at the cap. I just have to retime it and adjust the carb now.