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Yes. I know I thing or two about rebuilding alternators thank you. I didn’t go the cheap route. Both alternators are fine. It was a belt slipping

Thank you all. I’ll let you know what the problem is when I find it

The light actually increases with flashing and brightness with increased rpms. Yes I rebuilt them both twice. Sounds like it could still be a bad regulator though?

I have good readings at both alternators and batteries, new belts properly tightened. Gen 1 and 2 lights both come on when I turn key one click. After starting the truck both lights go off. After truck warms up (about 2 or 3 minutes) the GEN 2 light starts flickering faintly ( not full...

The Diode for Gen 2 is behind the voltmeter

Both alternators are fine. It was an in line fuse.

Was worried I had more problems then that.. Not sure if the PO fixed any wiring. Thanks for all the great info I will check all the fusible links

Ok thank you! I ordered a new Volt Meter. Will let the thread know if it fixes my Gen 2 problem. Since my Gen 2 system isn’t working properly would it cause my Gen 1 Alternator to start overheating? (pulley on alternator gets hot but housing doesn’t). Batteries show an under charge issue...

Front battery with truck running was 11.52 Rear battery didn’t change with truck running. Stayed at 12.62

I just had alternators tested and they both passed. Gen 1 light comes on but Gen 2 doesn’t. After I start the truck Gen 1 light goes out. Also I forgot to mention earlier, when I start the truck my Gen 1 Alternator starts heating up quickly, belt starts squeaking. I have enough time to...

Hello everyone and thanks for all the great information on this site! I have a 1985 M1008 that as we all know are very tricky to work on when it comes to their electrical system. I was curious if anyone knew if the Voltage Meter in these trucks has to be working properly in order for the...