wiper keeps blowing fuse

[jasnake65]

Have a 1960 with American Autowire kit installed less then a month ago, 100% all new wiring. Ran it in the garage and the wiper worked great. Used it over the weekend and started to down pour outside, turned on the wipers and they lasted like 1 min then the fuse blew. Got home and installed a new fuse and it blows(using a 10amp then a 25amp---S style fuse, no bulbs)
Unhook the motor and turn on the key, its good, unhook the switch and motor is hooked up and turn the key on and blows. Took a meter to the motor wires as soon as I ground the meter it goes blank, take off ground and reads back to zero.