2001 Ford Explorer 5.0 / 4r70w swap Help! Wiring Harness & ECU Options

[mynameisjonas]

2001 Ford Explorer 5.0 / 4r70w swap Help!

I have a '74 Bronco that someone has done a swap on that is a complete mess. They used the factory harness and ECU but it is such a mess and the transmission is not working that I feel I am better off starting over, than trying to sort this mess out. I am wondering what options are available. I was looking at the Ron Francis kit (MG-91E Ford 4.6/5.0 Explorer 96-01), but they are 16 weeks out. What other options are out there for a wiring harness? Also, is there an option to run a new harness and run a Holley Terminator X instead of the stock ECU?

 

[Timmy390]

What makes it a mess? I know from your other post you have a transmission issue that's more then likely due to a fluid issue or the trans needs a rebuild.

I've done a couple harnesses (Ford OBD1 and Suzuki OBD1) and all you really need to sort things out is a "pin out" as in a diagram of all the ECM connections.

I think you mentioned yours is a 2001 explorer harness. My guess is EFIGuy did the ECM programming (he does harnesses too but his work is EXCELLENT so I'm guessing he didn't do the harness). Find a pin out of the 2001 ecm. then remove the harness from the Bronco labeling all the connections as you unplug. Then start tracing and fixing any issues.

Tim

 

[JAF]

I've been looking at ways to control a '97 5.0/4r70w, and have been looking into the terminator X Max system from Holley, as a possible means to control the engine and
transmission. Something I liked about the Terminator X system is it comes with a new wiring harness.

 

[EFI Guy]

Give me a ring. 720-58TUNEZ