Hello,
1)Check the connections again maybe 1 or more connections is not properly connected..
2)then try to run that motor with different ESC and The ESC with different motor, so if any one of them is faulty you can figure it out
3)make sure that the ESC is hooked up with RX on throttle channel ....
4)Check if there is any physical damage to the wire insulation or wire itself
5) If the ESC is okay then check the motor with a multi meter, just put the multi meter on resistance or continuity check mode and connect the banana connectors to multimeter test leads if the motor connections are okay it should show low resistance between two terminals and if the connections are not proper the resistance should be infinite.
If problem is not solved by these steps then let us know,
(so we can try more complicated tests)
And one more thing please dont test a faulty motor with propeller on it..atleast not in home.!
Good luck..!