I think I'm finally done with the wiring diagram for RADesigns' Winters Rock Shifter. This is a little more complicated then Rory's intended shifter setup, as I need P, N, R, D (4), 3, 2, L (1) signals to control the PCS TCM.
If this wiring works as I think it should, the Winters shifter will generate 1, 2, 3, and 4th. P, N, R are generated by the OEM switch on the PS side of the V4AW3. These signals will be fed into the PCS TCM and also back into the OEM wiring to the PCM. Feeding the signals to the existing PCM will maintain (I'm pretty sure) existing functionality like backup lights, brake cut off for the cruise control, cruise control, the selector position in the dash cluster and anything else that would normally be affected by the OEM shifter.
The nice thing about this setup is that - with the help of the PCS TCM - I will have full manual 1, 2 and 3rd like Rory's setup with the shifter and switches, only without the switches. D (4th) will behave just like D normally does with OD and TC lock-up. I won't have manual control 4th or TC lock-up but I think I can live with that.
Wiring the shifter and TCM into the existing infrastructure is a lot easier than if I were trying to do this with a '97-98. The '97-98 only has L (1-2), 2 and D as noted in the diagram below. The '99 wiring matches up perfectly with the shifter and PCM, making this a straight 1 to 1 wiring job.
A couple days ago I found a wiring diagram on PCS' site for the Mitsu AW3.
Definitely not rocket science. I had Boomslang send me another harness for the '99 PCM so the half dozen connections to the PCM can be wired into the Boomslang harness, leaving the OEM PCM harness intact. Now onto building the spreadsheet for the transmission, shifter and PCM connections. Not too bad. Only about 35 connections. 1999 Mitsubishi Montero Sport Limit...ams V4AW3 RADesigns Winters Shifter v3.4