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We replaced the generator and all is fine now. I will be looking for a spare though. Yhanks for everyones help.

Well after doing some more checking, the little wire that shows no voltage with engine off, shows 23.92 volts with ACC on, and drops to 23.82 running. When I disconnect the the battery while the engine is running, it shows no voltage anywhere. So this means the alternator is not putting out...

Okay so I attached a volt meter to the little wire (586 ?) that shows no voltage when motor is off. Then while idling ~100rom it showed 23.8 I removed the allen plug and turned the adjustment screw quite a bit with no change in voltage in either direction? Any ideas???

Boatcarpenter, I did not mean it in a smart way, sorry. I greatly appreciate everyones help here. i just ment that the TM does not give a way to adjust the voltage, just to diagnose a problem. However, I already had the problem nailed to the alternator.

I have read the TM, and it never states how to adjust the alternator, just says replace.

Thank you, I will try that tonight. I assume clockwise increases voltage output? Turn it until I reach 28 volts? Should the truck be idleing at any particular speed?

Okay, I wonder if something fried because of the pinched wire? Or would that kill all output?

I have a deuce that the voltage meter seems to drop over time. One time it was no longer reading and my headlights were very dim. Found a small wire that was pinched on the alternator cap (was ground out and sparking). I repaired it, charged the batteries and all was good for a few days. Now...