[img]http://www.rowand.net/Shop/Tech/images/AlternatorWiringOverview-1963to1972Buick.jpg[/img]
#3 is the voltage sensing wire and is wired as shown. #4 is the exciter wire and is switched off by the ign. switch. The resistor and light can be tied together at the ign. or the resistor used by itself at ign.


'67 GMC 3/4 292 4spd