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Every once in a while us old timers know what we are talking about. :wink: Good job on getting it fixed.

I would check the drivers alternator and make sure it is still isolated (you can check it with a Ohm meter, check for reistance between the ground terminal and the case). If it is working correctly, then install it on the passenger side, buy a caddy alternator for the driver side and then look...

This may sound harsh but don't take it that way. The pictures you attached are ones that I took and posted. From your description, someone HAS been in the alternator and "forgot" to reinstall the "isolated ground" components. "Oh I don't need that, let me through it away" You MUST have all...

Post a picture of what you have inside the alternator. Sounds like someone else has messed with it and left some things out. You can possibly go to an Electrical Supply house and get a fiberglass flat washer, find one online or use the one in the Positve Terminal kit from CUCV Electric. I'll...

When you rebuilt the passenger alternator, did you follow the re assembly instructions in the TM 9-2320-289-34 manual? Did you reinstall ALL the internal washers and screw insulators? If not the you do not have an isolated ground alternator and will see fireworks when reconnecting wires.

You have some issues to work out. First thought is that someone has attempted to convert your truck to 12v, We need more pictures to help figure this out.

Glad to see the pictures I posted are still being used and referenced. I have hundreds that I keep in my Manual directories for the different MVs.