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I need a little help identifying some wires. Ive been using the autozone diagrams and they have worked great until now. I am at the part of the wiring harness that goes into the inside of the car. By the way I am dealing with a 1991 305 firebird harness. I am swapping into a 1987 s10. Its a junk yard harness everything was intact except the interior portion but I got a good deal so I am not mad. I know the one is the ALDL/obd1 connector just not sure where all the wires run. the other one I just dont know where all the wires go. Thanks in advance for the help.
Found the Pin out for the AlDL hope it helps someone later down the road.
Edit: I found this For a the pin out of the main harness Its also helpful but I need a pin out of that plug in the photo. http://chevythunder.com/fuel%20injec...%20pinouts.htm
I figured it out. the name of the connector is c207 and here is its pin out
Here is a better explanation C207
A Not used
C MIL
D Fuel pump 12v from relay
E ALDL B (OBDI only)
F PCM fuse
H ALDL F (OBDI only)
J ALDL M (OBDI only)
K VSS, PCM to gauge (Firebirds only)
M Cluster ground
N P/neutral
P Brake switch
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)
G and B power the injectors, F powers the ECU?
But on Thunder chevy it says G is EGR and B is for the fuel pump.
Your right chevy thunder is referring to tpi maf. Johns site provides the correct info. The ECM switched power should be protected with a 10amp fuse.
Iirc the injectors are protested bye 3 amp fuses.
05-09-2015, 02:57 PM
