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One of the wires going to the connection on the side where there is 4 wires is also red and green and had around 12v so I decided to cut that wire and splice it on the other side of the connection to the other red and green wire just to try and get 12 v to the alt to see if that’s the problem. So I cut the wire, tested it after I cut it and it was still reading around 12 volts then the second I connected it to the green/red wire on the other side of the connection it dropped to 3.3, I have no idea, any ideas?
The Light Green/Red wire starts at the ignition switch. Near there is a splice that feeds a few different circuits including the alternator exciter circuit. If you have multiple wires spliced in the engine compartment as you state, I would suspect someone before you has modified the factory wiring. Again, this is where a Ford EVTM manual comes in very handy. From this side of the internet I can only speculate what you are seeing and trying to redo.
Ok I don’t really have one of those manuals but I’ll take a picture of the connection but what would cause a wire to have 12 v then when it gets connected to another wire for that to change to 3 v?
Corrosion. Loose crimp. Crushed wire with maybe one strand trying to flow the power. Who knows.
There is a connector about 3" long total under hood with the green/black. Unplug it and see if you can just make a jumper from the battery to the alt side of the green/back. If it charges, work your way back in the body harness.
Corrosion. Loose crimp. Crushed wire with maybe one strand trying to flow the power. Who knows.
There is a connector about 3" long total under hood with the green/black. Unplug it and see if you can just make a jumper from the battery to the alt side of the green/back. If it charges, work your way back in the body harness.
The connector only has that, I did a 3G swap probably 20 years ago so honestly cannot recall how the stock harness appeared. 100% that is the switched wire. I do seem to recall it was two pieces in one loom.
It is green/red. I swore green/black. Wrongo!
The PCM ground I have in pic below. I flipped my cables to match the 1992+ style as my batt hold down failed once and positive arced into the fender. Fun. I just run a 92+ positive cable anyway as I have a PMGR starter and my ground is the good, used from my '96 7.3.
Bunch of stuff out as cleaning and changing stuff up
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