ok
the motor wire testing is done with the ohm meter
if the meter is auto ok if it is older set it to the 10 ohm scale
touch the leads together and the meter should read "0"
the leads not touching anything the meter will hunt or flash or read infinity
lets check A circuit first touch one lead to the black and the other lead to the green, the meter should read about 2.1 ohms. (see your motor ohm specs )
to check B circuit touch one lead to red the other lead to white (
blue@motor) the meter should read about 2.1 ohms. (see your motors ohm specs )
if good we need to check for shorts touch both the black and green wires to one lead and the white and red wires to the other lead there should be no reading on the meter or near infinity.
now holding all the wires together to one lead touch the other lead to the motor case and shaft there should be no reading or near infinity.
if all is good you can now wire the motors to the controllers
steve