EFIDynoTuning Forum

I can't find any information online but I'm looking for a diagram on how the TCM is wired. From my understanding the TCM tells the ecu to turn the overdrive off or on via pin 41. Right now, I have no control of the OD function. I've been pressing my luck doing pulls with the OD on. I want to make sure the wiring going to the TCM is good. I had to do a heater core and I might have missed something putting the dash back together.

Like I suspected, I mixed up a plug. It's funny that two identical plugs are in the same area. I had the TCM in the wrong plug. As soon as I switched plugs, I had OD control.

henry does stupid things thats just retarded