I have the relay module on my other harness. I'm not sure about the mav's charcoal canister working. I have yet to find a Mustang in the junkyard with that system all still attached and put together, so I don't even really know how it all works. Seems the air filter box and charcoal canister is the first thing people grab off these cars in the junkyard for some reason. I do have a basic understanding of the green plug, but I'm not really sure what to do with it. I assume most of it probably won't be needed as far as putting it in the Maverick goes, like the VSS wires? There is a pretty heavy gray wire with yellow stripe that is listed on the ford fuel injection site as the HEGO power wire. I don't know if I need to rig up a relay to put power to that, or what. I'm also confused about the fuel pump power/fuel pump monitor wire, which is two dark green wires with a yellow stripe coming out of the same connector on the plug. I'm running an F150 fuel pump. I'm thinking about just wiring a relay up to the ignition switch so that the fuel pump just turns on when you turn the key on. Then if you turn the key on without starting the engine, it'll just be pumping the gas in a circle back down the return fuel line back into the tank. Anyone see a problem with that? That's basically how I've had it setup every time I've ran the engine so far, except I just have a wire running straight from the fuel pump over to the battery, which is the red wire you see going across in front of the engine on my youtube video. As for the check engine light, can I just wire that straight to a light in the instrument cluster? Say, if I ran it up to the fasten seatbelts light in the cluster, which is totally useless right now, would that work? You might be right. That is another part that always seems to be missing from these cars in the junkyard.
i dealt with the fuel pump monitor thing when i converted my speed density mustang to mass air. look for instructions for that conversion. they will tell you where that wire needs to go. for the evap canister, you just need to get the solinoid that is in the vac line between the charcoal canister and throttle body on every ford from around 86 to 94. they should all also have the same charcoal canister too.
I guess I'm still confused on the fuel pump monitor. The wires Y out of the same connector. If one of those wires is providing power for the fuel pump relay, how in the world could the other wire monitor anything (how could it do anything other then what the other wire coming out of the SAME connector is doing)? Just looked up the speed density to mass air conversion, and there is a lot of good info there as far as wiring up the check engine light goes. But for the fuel pump monitor, they all say to just run it to the fuel pump relay under the seat, which of course the Maverick doesn't have. It seems I could just run it to any 12V source and that would prevent the computer from throwing a code. I need a clear, in plain English description on how the computer controls the fuel pump relay. Exactly which wires (dark green/yellow?), and weather they provide a positive or negative signal.
it doesnt activate the pump. it looks to see that the realy is on when the computer turns it on and that its off when the computer wants it off. it goes to the the wire that will goto the fuel pump it self from the realy. i see what you mean by fuel pump power. i dont know why its labeled that way. i would just hook one of the the wires up to the power wire going to the fuel pump and forget about the other.
The HEGO circuit is for the O2 sensor heater. If you are running the same O2 sensors out of the doner car(4 wire sensors) you shouldn't have to worry about any extra relays or anything. The ECC module will take care of all that for you. I hope that helps.
Jamie If you are looking for replacement pins for the green connector # 39 . Go to your NAPA store in there Belden cataloge they have replacement pins .Your part # should be 725160 for the male and 725161 for the female these pins are easy to change . Make sure you got the crimping tool for the belden pins makes it much easier . Jay P.S. These pins are for ford wedge lock connectors
