Ralph: Yes you should have just the two wires. If you have an idiot light instead of the ammeter you use all 4 and the inside of the regulator is different. The plug in connectors are the same in either case. Do like Kent  and I suggested. If you hook the two wires at the regulator togeter by pulling the plastic clip out and installing a little connector wire between the two then running the engines about 1000 RPM it should  charge on your ammeter. If not something is wrong with the alternator. Send me a phone number or you can call me after about 9:00 P. M. tonight.