86 GT, carbed SBC installed with an Archie kit, 4 speed manual
I have been fighting with wiring issues on a SBC swapped Fiero for a while now, and finally decided to take the nuclear bomb approach to killing this mosquito. I get the feeling it was initially installed by someone that was interested in doing the bare minimum work required to start the car, and was then redone by someone that didn't understand the wiring so they made the problem worse.
If this was your work, ...I apologize if I offended you but I recommend you don't claim this mess.Few more details about what I found: It is a carbed v8, but the computer was still installed. The original wiring harness ran through the firewall, then the wires were cut at various points throughout the engine bay to remove the unneeded sensors. Wires were spliced with different color wires in the middle of the harness making it very difficult to trace the wires. There appears to be minimal "aftermarket" wiring in other parts of the vehicle, all of which will be simple to undo.
So...I have completely removed the harness, and drawn out some charts of what I will need. Most of it I am pretty sure of, but I have a couple questions listed at the bottom, all related to the computer removal. Naturally I am open to other input as well, and certainly wouldn't turn down the opportunity to have someone double check my work. I plan to build the harness tomorrow, but not without answers to those two questions.
Sorry I had to put it sideways....only way I could get it readable and uploadable with PIP.
Chart on what wire is going where:
Now the questions:
Pin A on the Fuel Pump Relay was connected to pin A1 on the ECM. Can I assume that this is the signal to tun on the fuel pump and needs to be connected to a 12v ignition wire? Is it safe to assume that C203 Pin J (TBI1 injector fuse) would be a good spot for that?
Pin C on the A/C Relay was connected to pin C2 on the ECM. I am not clear what this is for...but since there is no ground connected to the relay, I assume that the ECM grounded it to allow the A/C to work? PLEASE correct me if I am wrong on this. Note that in stock form, the ECM receives a signal from pin A on the relay (B8 on the ECM)....I assume this is the signal that tells the ECM to ground it.
Thanx in advance for any thoughts on this...
