Anyone know if there is a difference in the way a 1990 Iroc body harness and a 1991 Z28 body harness would be pinned at the bulk head connector? I have found the 1990 bulk head connector pin diagram but cannot find the 1991. Any help is greatly appreciated.
Thanks,
Adam

 

These are from the 91 service manual,





Here is the C207 Dash-to-ECM connection: ( should be the same from 90-92 - double check to be sure !! )

1990 - 1992 C207

PIN Color From / To (Notes)
A Brown ( TBI )
B* Pnk (Red) INJ1 TBI (TBI)
B* Pnk/Blk INJ1 (V6 / TPI)
C Brn/Wht ECM / CE Light
D Grey Speed ECM to Cluster (Not with TBI)
E Wht/Blk ALDL (pin B) / ECM (test)
F Pnk/Blk ECM fuse / ECM
G* Pink/Blk (white) INJ2 TBI (TBI)
G* Pnk/Blk (INJ2 V6 TPI)
H* Tan/Blk ALDL / TCC-ECM (auto)
H* Tan/Blk ALDL / Upshift (stick)
J Org ALDL (pin E) / ECM
K Brown ECM / Buffer (Only TBI)
L Drk Blue Vats to ECM
M Org Interior Lights
N Org/Blk ECM / P/N switch
P Red Speed Sensor (Not with TBI)
R Ppl/Wht Crank Fuse / Cold Start-(only TBI)




Good Luck !

 

awesome! Thank you!!