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Thanks, you actually explained it really well. So is there different meanings for when the GEN light is solid as compared to flashing?

Could those symptoms I described be due to undercharging as well?? Thanks again for you help Ken

You might be right. I haven't seen anything in the TMs about the the meaning of gen 1 and 2 light flashing not solid. Or does it always supposed to flash when there is a problem? I was thinking it was overcharging because the GEN 2 light only flashes when the engine goes anything higher than an...

Oh I forgot the mention that the alternator I am having problems with was missing the alternator wiring harness, or the exciter plug, when I got the truck. I ordered a new one and connected it by braiding the wires together then covering it with heat shrink wrap tubing. I was wondering if this...

Thanks for your response. I did some basic testing before and everything checked out. With the truck off there was 12 v to the driver side alternator, 24 to the passenger side alternator. The batteries both checked out. I looked at the TMs and the regulator is supposed to be set to high so even...

My Generator 2 light flashes when the engine goes any higher than an idle, but I found that stops when I turn the heater on. Does this just mean that the alternator is overcharging because there is little to no load on it but when the blower motor comes on gives it a load?? My main concern is...