Here is what I've got so far on wiring (excuse the picture size):
Grey 7 Way plug:
Black 8 Way plug:
Wiring from TPS (Used in conjunction with the Crank Position Sensor diagram to decipher which PCM pins to tap):
My crude drawings(Where I wrote 'Px' denotes PCM where 'x' is the pin number on the PCM. 'Tx' deontes TPS pins A-C.):
My question is that all the data I've come across has two things missing. On my drawing on the grey plug it is 'pin A' and 'pin H'. My ALLDATA doesn't have anything listed besides color on the grey plugs and I haven't found any info on what those two additional wires do. Still searching.
I hit another snag that I'm trying to figure out. The TCU connector I have had the C10 spliced to the D16 and then out (which is fused power) whereas all my OBDI diagrams have shown that C10 is supposed to be the brake signal and C11 is supposed to be spliced to D16. Gonna try figuring this out before proceeding further. As far as I know the TCU harness was cut from the vehicle and not modified before now.
After exchanging some PMs with meangreeny he got me straightened out. The jumper (w/resistor) was for the XJ's cruise control setup. I clipped that part out of the harness and ran C10 to the brake signal output on the PCM and spliced C11 and D16 together as per the wiring diagrams.
In addition, pin 'A' and 'H' in the grey plug at the transmission are used in the factory Cherokee wiring harness for vehicle speed sensors, which are not needed in my YJ so they have been capped off.
(Weekend Toy) Build thread
11 Ram 2500
- 6.7 Cummins (DD/Tow Rig)
05 Liberty Limited
(Wife's): Minor mods, OME/JBA Suspension, 245 70/17 Duratracs