3G Alt is in.

[Glen]

I have the 3G in and it was no big deal like you guys said. I used a 150 amp breaker, I couldn't find a fuse or a holder that they didn't want $30 for. The whole thing cost about $65 with the alt. The engine bay is dirty as it has been snowing and cold so I haven't cleaned it for a while.
The only thing is I had to leave all the wires on the starter solenoid. If I took the 2G ring off I had no power to the car! I have a picture of it if you can make it out. The order of the wire on the solenoid is: 2G ring, new 2AGW 3G wire, battery wire, and one other one that has some kind of relay on it. I put the breaker on the left side by the alt. and ran the wire around the front like the 2G. The only wire I had to cut was the green one. The clocking is off a little, but it worked out the way I wired it. The last two pic. are of the old alt and left over wire. I'll use it to run a new ground wire.

[gabegt90]

NICE so I'm assuming you just spiced a new regulator plug on right? was your 3g the small case or the large case did you had to swap brackets? install I see you ran it along the front of the header panel

[85crownHPP]

who said it is a big deal? theyz on drugs...

You shouldnt have to leave the 2G charge wire on the solenoid... methinks you may have mixed it up or accidently left a different/additional one off. At least my 1G wiring will let the car run if you leave it off... 2G might be different.

Good work

[Glen]

It is a small case, just unbolt the old and bolt the new one in. I had to change the top bolt as the new one didn't have threads. I used the plug that came with the the 3G. It looked a lot easier to run the wire around the front.
No I don't think I left any wires off. I just pulled the old wires off the alt., put the green ones together, and pulled the old wiring out. The wires on the solenoid are black/orange and yellow. They come together at the ring. All I know is if I take the ring off nothing works, no lights or anything.

[85crownHPP]

I mean on the solenoid... black/orange and yellow are the main power supply wires for the car IIRC, so that would make sense.
The alternator charge wires at the solenoid should be black/orange stripe once you get past the single fuse link, and I dont see it in your pic so you must have already removed it :confused: which should mean everything is good

[86GmLsCoupe]

Looks really good, how do you like it so far? Get to test it with all the accessories on yet? I turned every single thing in my car on when I first started the car with the 3G and was very happy to see no flicker. I ran my wire over the engine just because the wiring is a little costly and I thought longer runs put more load on the wire. You'll be fine the way you did it given the gauge. Ford just ran the wires odd that way, one large harness with the charge cable and headlight wiring all the way around the header. The only big problem besides extra wiring is if the cable burns somewhere inside along that insanely long harness, it kills all the other wires and is a nightmare to find. For the old charge cable on the starter solenoid, it might trick you because those two black/orange wires turn into one just where they come out by the battery, that's the only one you take off (yellow is voltage sense-needs to stay). When I did the wires, I forgot that other ring with the small square metal thing on it and the car didn't start. So just that one ring terminal with black/orange output wire. I'll snap a pic of mine if it's still throwing you off. I thought leaving it connected might leave the old output wire live and pose a hazard.

[gadget73]

This is a typical case of it sounds far more complicated than it really is. T

[Glen]

I have to agree, it sounds worse than it is. The black/orange wire starts out as two at the old alt. and is just one at the solenoid. I pulled the old wiring plug on the left side and taped it up. I drove it home last night and back to work today. It was dark both times and it worked like it should. Hell the car even seems to run better. With everything on the it shows 13.5 volts and didn't drop and the lights didn't dim.

[mitymerc]

Originally Posted by Glen
The only thing is I had to leave all the wires on the starter solenoid. If I took the 2G ring off I had no power to the car!




Upgrading the '91 MGM CP

I was looking @ the harness yesterday, the large plug harness seems to have a white/red wire that goes to a 4 wire plug it seems to be related to the big bk/or wires. I got tired of standing in the rain before I unwrapped the harness to see where it came from. It has w/b, w/r, bk/or, & brn (maybe orange) wires coming out of it. If I disconnect it, what happens????

I don't want the bk/or wires hanging around & anticipated removing them.

I want to use an Expedition alt harness that I recently liberated.

[gadget73]

Some of the later cars have more than just the alternator wiring on that particular ring. The only things going to the alternator are 2 black/orange and I think a yellow/white, or maybe its solid yellow for the battery sense. If you've got more wires, you'll probably have to do a little wire shuffling to keep them connected so stuff works.