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Okay so batteries tested good. Truck was running fine today. I disconnected a handful of stuff I wired a few days ago, but both batteries were staying around 12.6v. a day or two ago my front battery was dropping .1v a second after start up. I was trying to get my generators testing too but after...

Yeah I got my original ones tested but not the ones I currently have in there. So I'm just gonna get everything load tested one more time and hope thats the problem

Yeah and I did get a load test and one was going bad. So I put a brand new one in with the same problem, and my other battery was reading like 7v, so I put in another 650 for testing. Yes, the cca is way too low but it was all for testing. I'm gonna get them load tested again today to play it...

And I forgot to add, I definitely think somethings going on with the charging system, but when one battery was reading a bit over 12 and the other was 11.8, I wasn't getting a crank, and hardly any power in the cab. After a few seconds holding the golowplugs it sounded like a relay ran out of...

Okay so everything looks stock to me. But both alternators have ground, as well as reading voltage. It might be worth mentioning I couldn't ever get a tach to work with that tach wire, so I put in a w terminal and couldn't get that to work either. I'm re testing everything now. Is there anything...

I'm not great with electrical, mostly learning as I go. So what does the exciter circuit do? And how would I test it? When I get home today I'll retest everything. But the fact one batteries staying at 12.6v while running and the other draining immediately is what's throwing me off. The battery...

I have my original batteries, but both were reading low so I threw on the 650cca ones mainly for testing. But now my good batteries are charging no problem off of the truck. I tested my alternators yesterday just with the regular multimeter test. Regardless of which alternator was disconnected...

So I've been having a handful of electrical issues on my m1008 for the last few weeks and I can't figure it out nore find a solution anywhere. The biggest issue is starting. Both batteries are around 12v (ones been around 11.8 most the time) but I'm not even getting a crank most the time...