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*72lb4x4* · 03-21-2010, 06:40 PM

If you think of the battery gauge as what it is it may help. Its a voltmeter that indicates charge or discharge of the battery.

It measures the difference in voltage at 2 points in the charging circuit. One point is close to the battery and the other is close to the alt. If the alt side is higher, indicating the alt is working, the gauge reads toward the right.

This is the same as the shunt resistor discussed above except that GM eliminated the shunt by using the wiring in the truck.

03-21-2010, 06:40 PM	#22
72lb4x4 Account Suspended Join Date: Jul 2006 Location: DFW Posts: 1,427	Re: Battery/amp gauge If you think of the battery gauge as what it is it may help. Its a voltmeter that indicates charge or discharge of the battery. It measures the difference in voltage at 2 points in the charging circuit. One point is close to the battery and the other is close to the alt. If the alt side is higher, indicating the alt is working, the gauge reads toward the right. This is the same as the shunt resistor discussed above except that GM eliminated the shunt by using the wiring in the truck.