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Heh, yeah I wish I had a whole load of automotive testing equipment, and a big garage, and a machine shop, and, well, a whole lot of stuff. Anyway, I found a place just up the street from me to rebuild it, it's actually where I got the batteries I have in the truck now (some sort of generic...

Between the positive and negative terminals? The same as the battery (going from about 11.5V just after starting and rising back to around 12.5V). With the engine off and the glow plugs and starter not used for a while the red wire of the plug reads about 12.5V and compared to the ground the...

As an update, still no luck. I've found that whoever used to work on the truck had a habit of doping electrical connections with what appears to be axle grease, and it makes for a mess when trying to clean it. I fiddled around with the plug on the alternator, with the brown and red wires, but...

Heheh, I have absolutely no intention of converting it to 12V. I had to stop working on it because it was getting dark and really cold, but my plan of action for tomorrow will revolve around checking voltages in different connections (as per the TM's troubleshooting) and taking that sucker to...

Yeah, I know it's supposed to come on with the key in the "ON" position, but its the dimness of it that gets me. The Gen 2 light is bright as can be before starting the truck, but the Gen 1 light has the same dullness it has while the truck is running. The alternator doesn't seem to be...

Thanks for the manual. I had previously found a operator's manual for it, and have been using a Haynes repair manual meant for the civilian trucks. Not everything matches up. Hopefully this will be some help. I hope it does come down to just a corroded contact somewhere, maybe at the voltage...

I did try wiggling the plug around, but I didn't actually take it off or check voltages. If the red one has 12V, is that with respect to the chassis ground? I would suppose that the 12V there is connected to the front battery and therefore the chassis ground. I'll also have to look into the...

Hello everyone! I've watched this site for some time, particularly recently as I've purchased a 1986 M1008 (and have just finally been able to get it tagged) and have been doing repairs on it. Now I seem to have an alternator problem, and I'm left scratching my head and hoping that someone...