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Thank you for the lengthy response. I opened up the turn signal housing and light switch housing and visibly saw the burnt cable ends and burned wire sheathing. I did replace the old burnt up PCB with a camotek system box when I fiest got the truck, also cleaned all of the grounds front to back...

Thank you for your input, wouldn't all shorts go to the nearest ground though? Not all the way back to those two components? Sorry, I'm a machinist, don't know much about electrical other than changing out a few drives, motor starters, thermal overloads, etc.

Afternoon folks, I have all LED lights on the truck and they have been mostly fine. Recently, my right rear brake light and turn signal stopped working, but the running light functions. Didn't pursue the problem other than cleaning the ground wire. Now the left rear running light doesn't work...

Thank you for the input, I have some board that I use for custom chip/splash guards at work to ziptie on there. My only worry is, will the transmission cooler still get enough airflow to chill? I'm not familiar with the 3l80

Morning folks, I have a M1097R1 with the NA 6.5 and 3 speed trans. During the summer the truck's temperatures were textbook. Winter has rolled around and I think I might have a problem. In my routine, I wake up, start it, it might idle for 5-8 minutes then I drive off. My work is 10 miles away...

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...