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Thing is that the alt's wiring harness that says do not ground clearly has a battery terminal connection -- both the one I have and the one on that real4wd link in my last above

OK, latest update. This morning I pulled the passenger side 24v alternator with only a minimum amount of bloodshed. Notice I called it "24v" alternator. That's because, and here's the silver lining for my mistakes, at least one big one: Turns out that that alt is indeed an original (or at...

Oh, and of course I did learn one thing. If pass side alt was frying the battery wirh alt putting out 18v, imagine what would happen if it was putting out 24v even if I could find a replacement 24v alt. As it was, at 18v, the battery leaked battery acid out the top.

Great thought but don't have the original alternator. Came with the one on it and the label on it says remanufactured so pretty sure it's not original. And, as we know it's putting out 14v and change when running. And, you can't buy the original 24V alts that were originally on some of the...

Guys, please stand by until tomorrow, or maybe even Sunday. I'm replacing the passenger side alternator and I ran into a bit of trouble with the belt tensioner and I'm sorting that out right now. Going to replace that alternator with a new DR44 so at least both my alternators will be the same...

OK, did as you suggested. Results are: Engine off / using terminal in alternator for the brown wire with pigtail off to positive battery terminal = 27.6v -- I get the same result, 27.6v, with the engine running Engine off / using terminal in alternator for the grey wire with pigtail off to...

Thanks very much -- your responses are very much appreciated! Last night it was dark when I replied and I didn't feel like going out and looking at the new/replaced driver side alternator. As I mentioned, I'm not very good at this electrical stuff and here's more proof of that. The...

Wow, thanks very much! Maybe that's my problem -- AD-244 vs. AD-244G. Charging system is factory dual alternator and dual batteries. I didn't want to get into it for fear of scaring people off from responding, but here goes. The truck is ex-military called a Light Service Support Vehicle...

Have 2006 2500 HD Duramax with dual alternators. Recently purchased the truck. There's a wire missing and since it's missing I have no idea where it is supposed to run to. The wire stems off from the driver's side alternator's connector wire and runs to a connector, but at that connector the...