Originally Posted by Dubs99sahara
Thanks! The AW4 is out of a 2001 Cherokee. I have the plugs coming to connect to the AW4 plugs and have the wiring instructions from the swap listed in a previous post. Any suggestions while I have this thread going?
A few things I've learned doing them are purely to satisfy my sense of logistics and how things should be.
It's common to run the gray and black plugs up to beside the dipstick on the 4.0. When you hook up the Reverse light feed and the NSS circuit, it makes sense to me to abandon those circuits on the TCM side of the plugs and tap into the AW-4 wiring before those plugs otherwise you wind up with wires that do a 180 from one side of the plug back down to the trans.
I do my taps at their sources. The brake sense wire is picked up at the brake light switch.
The NSS is picked up at the old NSS circuit on top of the trans.
The TPS is picked up at the TPS itself.
I mount the TCM to the underside of the passenger air bag with some very sticky velcro. If you drill one 3/4" hole with a grommet right above the HVAC unit, you can bring in the power from the PDC and battery right there and it's a pretty much straight shot to the TCM.