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Yeah you're right, posting what the diagnostic flowcharts say would have been the better thing to post along with the readings. I'll correct that in the future. As for touching the red and black meter leads together and see what that ohms out to. I also found in the TM two pages on overcharging...

So I feel as if I am getting some conflicting measurements when trying to prove if the alternator is defective or if the regulator is. Here were some quick measurements that I took, Measuring bolt heads in battery box = 25 Volts While truck is running the AC line on regulator = 15 Volts...

It's been a long hot week, thanks for taking the time to give input. I will check this out tomorrow afternoon and start running diagnostics. The whiteboard of issues continues to grow.

Evening folks, I will try to provide more detail or pictures if needed, I've never really tinkered with cars before but loved the humvee in the military. I recently picked up my first humvee Monday. Fired right up. It's a M1097R1 with a 3 speed, and 6.5. It has what I believe is a 200 amp...