Open the EWD pdf, "ctrl f" for find, search for IH1 and write down each wire colour and designation.
Registry 8x Series V8 Swaps (9 Viewers)
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Thank you so much, that helps a ton. I have the factory manual and it's got nothing quiet like that... at least not that I could find.
Make sure you have the right year on the ewd. Also. I suggest you get one of these.
It might be one of the best tools out there.
i have a 3x locked 93. the closest I could find is 94... I believe its the same
You've got to print them out in color and tape the pages together in long sheets to work with. Also print out the pages that show the pin outs of each connector.
great, you have a paypal? sell me yours.
Doing it now for you from the 1994 EWD, I need to make the list for mine anyway.
From the 1994 FZJ80 EWD, this is the IH1 pinout. I've made everything I would consider essential in bold, I don't know what harness you're running though.
- R-G SPEED SIGNAL
- G-L WATER TEMP SIGNAL
- R-B REVERSE SIGNAL (to comb. meter and reverse lights)
- B CHECK CONNECTOR/TACH SIGNAL
- Y POWER TO TRANSFER, REVERSE SWITCH ETC
- B-L SIGNAL FROM TRANSFER FOR L4
- Y-R A/T OIL TEMP WARNING LIGHT SIGNAL
- G-W STOP LIGHT SIGNAL
- B-L +12V FROM 7.5A IGNITION FUSE
- B-W A/C CUT RELAY
- G CDL
- G-L CDL
- G-Y CDL
- B-W STARTER TRIGGER/POWER TO NEUTRAL SAFETY SWITCH
- B-R FROM NEUTRAL SAFETY SWITCH TO CIRCUIT OPENING RELAY
- B-G IGNITER IGT (signals the ignitor to fire the coil)
- B-LG IGNITER IGF (confirmation of trigger from the igniter to ECU)
- R-W VOLUME AFM
- G-B CDL
- G-W IDL TO ECU
- B-G INJECTORS
- Y-R POWER TO CIRCUIT OPENING RELAY, NEED FOR FUEL PUMP, PLEASE CONFIRM?
- W-B EARTH
- G-B WATER TEMP CUT FOR A/C CUT RELAY
Last edited:
And for IH2.
From 5:58 you get to see a good view of the harness before and after thinning out.
- Y-B CDL LIGHT
- Y-G TRANSFER NEUTRAL POSITION SWITCH
- Y-W CEL
- O A/T INDICATOR “L”
- G-L A/T INDICATOR “2”
- B-O A/T INDICATOR “D”
- R A/T INDICATOR “N”
- R-L A/T INDICATOR “X”
- Y-R OIL LEVEL SENSOR
- R-B CHECK CONNECTOR FOR FUEL PUMP
- B-R SPEED FROM COMB. METER TO ECU
- W-R FUEL PUMP RELAY TRIGGER FROM ECU
- V-W CHECK CONNECTOR “TC”
- GR-R CHECK CONNECTOR “TS”
- R CHECK CONNECTOR “WA”
- R-B ABS RELAY TO CHECK CONNECTOR
- G-L CHECK CONNECTOR “DG”
From 5:58 you get to see a good view of the harness before and after thinning out.
The manual is free on this site. Recommend downloading and just printing the EWD (electrical wiring diagrams). It will take some time to gain familiarity with them. Take your time. Print out the following systems, combination meters (cluster), transmission control, engine control, center differential, cruise control, power distribution, power supply. That’s about it. I’ve been meaning to put a video together on how I did mine. Issue is, every swap might be different. Model years, engine variants, gm harness or aftermarket. A lot of variables.
This is what I mean print out the pages in color and start to get familiar with them. I’ll make an intro video later with some basics.
I notice on IH2 you don't use the fuel pump wiring. are you bypassing the factory wiring and going directly from your gm harness to the pump? I bought a standalone ls swap harness that has wires to go to the fuel pump and that is kinda what I was thinking about doing. sorry for all the questions, wiring just melts my brain.
I just made a video on all of this. It’s uploaded. Be done in an hour.
Here hope this helps people start their swap journey on the wiring. Just my opinion. Lots of different ways to do it I’m sure. But this should show you how to begin.
That's awesome, really helpful!
Thanks, hopefully it gives someone an idea of where to start, and if this is something they think they can do or not. Be curious to know how different others did theirs. Or how some of the shops on here are doing it?
Does anyone know on a 4L80, the two VSS, which plug goes to which pins on the RED connector. I did put the reluctor gear in the transmission to read the rear sensor. Unfortunately both connectors, (one which used to be on the GM transfer case) are the same. There are different wire colors. Just not able to find which one is forward and rear. Thanks.
tmxmotorsports
SILVER Star
Aftermarket harness?
stock gm harness, just can't find which connector needs to be fwd, and which one rear. They are still pinned in the PCM connectors, but my material only says VSS, not fwd or rear.
Thanks to Tinker! Got the pot installed on the shifter. I used a countersunk Phillips and a small 1/4 high torque nut. Along with a recessed “domed” washer that fit perfect. Was in my hardware him from my days as an aircraft mechanic. Worked great!!
