I’ll tell you like it is, it going to be hard but you can do this first take the ole 80 and power wash the under side and degrease that dirty lady then get her all wet again then take her home ,label all connectors get the old FSM out and start taking all the connectors apart you will need to get a few gasket like the plenum intake top and throttle body gaskets to get to the injectors that’s what I did you can also clean up the tubing as well. Get your self some pick tools from harbor freight to help get them connectors apart. The good news is any questions you come up with can people on here will find you an answer to help out good luck.Hello,
My 97 TLC (FZJ80) with TRD SC is in need of main engine wiring harness replacement. Has anyone written a step by step procedure with pictures showing proper sequence of harness/connector installation? How hard is to reach & connect transmission control wires/connector? Any help is greatly appreciated.
big thanks to @Onur for this. I need to make some transition harnesses and after 2 days of digging around to find the Toyota part numbers for what I need and then facing the task of finding the appropriate splices I stumbled across this post.
Brought everything into focus in short order and I'm confident moving forward.
These two are useful if you are trying to connect universal O2's to the factory harness.
90980-11028: gray, 4 pin w/clip: For Bank 1 Sensor 1 O2:
View attachment 1418839
90980-10869: gray, 4 pin w/clip. For Bank 1 Sensor 1 O2:
View attachment 1418840
While not a part of the main engine wiring harness, you will need these connector a homemade fusible link to your harness:
90980-10983: gray, 1 wire, fusible link side:
View attachment 1418844
90980-10982: gray, 1 wire, harness side:
View attachment 1418845
90980-11144: black, 6 wire. For the IAC valve:
View attachment 1418847
Alternator connector seems to be a 90980-11349 not a 10841.90980-10944: big, gray, 3 pin, 2 unused (at the alt, with bracket):
View attachment 1418860
90980-10841: gray, 3 pin (alt side):
View attachment 1418864
90980-11317: black, 5 wire, for the MAF:
View attachment 1418869
90980-11153: gray and brown, 2 wire, for the injectors. When you buy replacements, they only come gray:
View attachment 1418870
90980-11246: Gray, 2 wire, for the coil:
View attachment 1418871