Thread: Difference in engine harness for 97 GTP vs 98 GTP

Originally Posted by BillBoost37

FWIW if you don't want to change the map connector, use an L32 map sensor.

This is good to know. I'll probably go with one of the L67 adapter harnesses anyways so I'm not too worried about this, plus I have an extra L67 MAP taking up space in the garage. Might as well use it...

I'm going to add another note for anyone that comes across this in the future. ZZP says that the adapter they sell will use pin 77 on the clear connector for 98+ vehicles. After looking at my wire diagrams, this should be pin 23 on the blue connector for 97 models.

I'm going to start working on the diagrams for the tranny next so more info will follow.

***The following will show you the wires and where to pin them on the 1997 computer.***

14 Pin Connector to Transmission

D C B A

x x x x x x E

S R P N M L

x V U T

1997 Computer Pin Out Location:

Pin_____Wire Color___Circuit #________Pin Location for Computer
A________LT GRN______ 1222__________________Clear 11
B________YEL/ BLK______1223_________________ Clear 17
C________RED/ BLK_____ 1228_________________ Clear 61
D_______LT BLU/ WHT___1229__________________Clear 20
E__________PNK_______1039/839________________Blue 19 ***Splice into existing pink wire
L__________YEL________1227__________________Clear 71
M__________BLK_________808 _ ________________ Blue 56 ***Splice into existing black wire
N__________PNK________1224__________________Clear 27
P__________RED________1226__________________Clear 31
R_________DK BLU______ 1225__________________Clear 29
S_________RED/BLK_____ 1230___________________Blue 7
T__________BRN_________418___________________Blue 22
U__________YEL_________657___________________Clear 75
V_______DK BLU/ WHT____1231___________________Blue 46



I just want to say as a disclaimer, that this is what I have come up with after comparing harnesses both at the junkyard and using the info in Alldata. I have not yet tested this so please use at your own risk. I'm not responsible for any loss or damage you cause as a result of following this information. Once I have a chance to test it, then I will update the thread to let everyone know that it works!

I figured I would add one more post here.

My plan is to hopefully get a junkyard harness cheap. The harness will have to be intact to do what I want. The plan is to pull the 14 pin connector and accompanying wires all the way to the pins in the connector. I want to try this route vs running the wires so that it all stays factory. I will use loom and tape to really go for that factory look.

At the end of the day it will be a learning experience lol! I have messed with wiring before but not on this level. Although its pretty basic, I've never tried to build into a harness like this. It should be fun!