88f250 overcharging need some help

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Mar 24, 2007 | 09:57 PM

dude73

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Joined: Apr 2004

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From: zanesville ohio

88f250 overcharging need some help

i have a 88 f250 4x4 5speed 7.3idi thats overcharging. New alt. 100 amp, new voltage regulator, new batteries 880 cca, and new battery cable. Trying to charge, starts at 14.5 and slowly charges to 22 volts. Any idea whats wrong????

Mar 24, 2007 | 10:09 PM

dwaymar

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Joined: Sep 2005

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voltage reg not working right if new take truck to store you bought parts from and have them see this have them give ya a new one there

Mar 24, 2007 | 10:15 PM

PLC7.3

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Joined: Nov 2004

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From: Manitoba

Can you check the charge at the battery with an volt meter to confirm guage readings, AP store will when you take it back. Just do not boil the batteries...

Mar 24, 2007 | 10:59 PM

dude73

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From: zanesville ohio

i checked it with one

Mar 24, 2007 | 11:24 PM

KJLYPW

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Joined: Oct 2005

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From: Powell River B.C.

Make sure you don't have the feild terminal on the alternator hooked up to direct battery power, that will give you unregulated out put. Regualtor should keep the feild voltage below 14 and may even be lower depending on Current demand on the alternator. Otherwise the contol circut in the regulator is on full and not doing its job.