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VStar650CL »
https://forums.nicoclub.com/vstar650cl-u299034.html
Thu Aug 11, 2022 3:14 pm
The short answer is, probably not. With two wires on the control connector you know one is the field supply and one is the lamp driver, and you can give the unit power and ground and see which of the two wires goes to ground (that will be the lamp driver). Three wires means one of them is a PWM or analog output control ("smart" alternator), and that may show an ohm reading just like the field supply if the alternator isn't operating. If the terminals aren't marked and you can't identify the donor vehicle, you may need to disassemble it or just take your chances.