by donivan65 Fri Apr 30, 2010 8:46 am
It would be used for the idiot light for the charging system on the dash and to energize a 3rd Gen 3 wire alternator, but if you have voltmeter and a real 1 wire alternator, it won't be needed. To test it, undo it out of the connector, put a 12 volt test light between the wire and the terminal you took it off and start the van,,,,,,,if it lights, then that means that something is using that wire. If the test light does not light, that means the wire goes nowhere.