The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Need Help: Wiring stock battery gauge to one wire alternator.

franken · 05-04-2017, 11:08 PM

The stock battery gauge measures the difference between 2 voltage sources. One closer to the battery, and one closer to the alternator. If the alt side V is greater than the battery side, the gauge shows charging.
Regardless of the rating of the alt, it delivers what the load requires. If the load requires more than the alt rating, voltage starts to decrease.

05-04-2017, 11:08 PM	#15
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,052	Re: Need Help: Wiring stock battery gauge to one wire alternator. The stock battery gauge measures the difference between 2 voltage sources. One closer to the battery, and one closer to the alternator. If the alt side V is greater than the battery side, the gauge shows charging. Regardless of the rating of the alt, it delivers what the load requires. If the load requires more than the alt rating, voltage starts to decrease.