hey guys im in a pickle. i bought a junk trans am 2 years ago for the motor and trans to do a swap in a 55 chevy truck of my wifes. its a tune port 700 r4. i marked everything i cut but guess what the 2 years faded my pen marks and now im lost. what im looking for is the wiring that connects near the computer and runs under the dash. there are three plugs all together there. one is grey and has 5 wires and the other is 2 are black and have roughly 9 i think wires( im not near the car) most of those wires are connected to the obd port anyway just looking if someone has a link to the harness for those wires. again i do not need the ecu diagram or the engien diagram just the wires that run under the dash from the engine harness

 

I think this is what your askin' for ;

This is the list of wires at the Dash-to-ECM harness under the pass side of the dash,................


1988 C207 (maybe 89 too)

PIN Color From / To (Notes)
A Brn ALDL (pin C) / ECM (AIR control)
B* Pnk (Red) INJ1 TBI (TBI)
B* Pnk/Blk (Pink) INJ1 (V6)
B* Pnk/Blk (Black) INJ1 (TPI)
C* Brn/Wht ECM / CE Light
D* Brown (Tan/Wht ) Fan
E Wht/Blk ALDL (pin B) / ECM (test)
F Pnk/Blk IGN fuse / ECM
G* Pnk/Blk (White) INJ2 TBI (TBI)
G* Pnk/Blk (Pnk/Black) INJ2 / (V6)
G* Pnk/Blk (Black) INJ2 (TPI)
H Tan/Blk ALDL / TCC-ECM (auto)
H Tan/Blk ALDL / Upshift (stick)
J* Org ALDL (pin E) / ECM
K Brn/Yellow (brown) ECM / Buffer
L Drk Blue (purple) Vats to ECM
M Blk/Wht VSS,P/N switch / Grd
N Org/Blk ECM / P/N switch
P
R Ppl/Wht Crank Fuse / Cold Start-ECM


Good Luck !