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sakohntr · 05-26-2003, 12:14 AM

With the truck off, check the voltage at the battery. Then start the truck and check the voltage at the alternator. You should have a slightly higher reading at the running alternator. Take your alternator reading from the larger terminal on the backside which has the heavy guage wire attached to it. Your alternator voltage should also rise with an increase in rpm's. good luck

05-26-2003, 12:14 AM	#2
sakohntr Registered User Join Date: Mar 2002 Location: Floodwood Minnesota Posts: 1,057	how to With the truck off, check the voltage at the battery. Then start the truck and check the voltage at the alternator. You should have a slightly higher reading at the running alternator. Take your alternator reading from the larger terminal on the backside which has the heavy guage wire attached to it. Your alternator voltage should also rise with an increase in rpm's. good luck __________________ 1967 K30 Napco 292/SM420 original paint 30k miles 1968 K60 Napco 396/5spd. dbl frame 52" michelins 1969 K10 SWB GMC 454/4spd 6" 35's posi,hooks 1972 C30 longhorn,BB/AT,A/C,Tilt,Toolbox,lokr 1987 K20 Chevrolet Suburban. 6" lift. 5.7L/TH400 1979 K60 GMC Coleman 4x4, 427/Allison.