Easiest way to test the 3 phases is to just short them together and see if you have resistance when turning the can. Hold two together and spin the motor by hand. Then hold the second pair together and turn it by hand. Then hold the final pair together and turn the motor by hand. You should feel resistance. Then, hold all 3 wires together and you should feel even more resistance than just holding 2 wires together. Don't spin it too much, you are dead shorting the motor and it can and will build up heat in the connectors that could burn you. You have been warned.