I have the Lucas alternator and it tested OK. The problem is it is not charging on the tractor. The guy testing the ALT said that the small terminal was the ground and the 2 larger terminals were positive. I have the 2 large terminals (on back on the ALT) wired to the positive side of the battery, and the ground is good. My question is, can anybody confirm the proper wiring for this alt. FYI, the factory wires were all cut and the alt was not hooked up when I got it.