Voltage wont recharge after startup

Voltage wont recharge after startup

12-26-2007, 05:45 PM

#1 (permalink)

CumminsFarmer

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Join Date: Dec 2004 Location: North-Central Idaho Posts: 95 Photo Gallery Old Reader's Rigs Gallery

Voltage wont recharge after startup

Hey guys,

I have a friend with a '97 12-valve just shy of 300k miles. He just put a new alternator on a couple weeks ago. Old alternator bench tested BAD, new alternator bench tested GOOD. About 50% of the time after startups now his voltage will not move up to the 14 mark on the gauge for a really long time, sometimes 5 minutes! His alternator is putting out 14.1 volts at idle, however his batteries are not in the best shape. Grid heaters seem to be cycling normally, but not so sure when the voltage is down. I think all connections are tight but not sure, as I didnt do the alternator swap and we checked it in the dark. The other 50% of the time his voltage will build back up after a few seconds just like normal. Any input appreciated!

-Cole

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