Not sure, but I remember reinstalling mine when I redid the wiring harness. Think I got it in with the wires backwards and when I started the truck up, it read that it was discharging. Swapped the wires and then it read that it was charging. Believer that the ammeter simply reads the amps inline with the wires and you can't screw it up beyond reading incorrectly. Good luck!


Country Roads, West (By God) Virginia
http://community.webshots.com/user/geezer