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68gmsee · 09-27-2018, 10:41 AM

Quick question. What does the amp gauge read when idling or at higher speeds?

On a fully charged battery with AC, radio, lights turned off you should be able to run the truck for a few miles at highway speed. I've done that on mine. I have a one wire alternator I bought at NAPA for my tractor and it's worked great for many years.

Other things to check all the ground straps -especially from engine to cab. On my 68 my gauge wouldn't work until I installed several ground straps including one from radiator support to the battery ground.

09-27-2018, 10:41 AM	#16
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Help...1972 350 W/HEI Quick question. What does the amp gauge read when idling or at higher speeds? On a fully charged battery with AC, radio, lights turned off you should be able to run the truck for a few miles at highway speed. I've done that on mine. I have a one wire alternator I bought at NAPA for my tractor and it's worked great for many years. Other things to check all the ground straps -especially from engine to cab. On my 68 my gauge wouldn't work until I installed several ground straps including one from radiator support to the battery ground. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...