volt gauge getting 17v after battery replacement batterys went dead tryed jumping then replaced with two 800 cc batteries new. 91 f350. did i fry the alt/ reg?
X3 Ya Replace the regulator before you blow the batteries, good thing they are new, old batteries could blow real quick, hell of a mess and might blind or burn someone badly.
14.2 to 14.5 volts should be max charging. Alternator won't last long either charging 17 volts
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