Vilord.......
Vilord, I agree that there is a reason for that fuse to be blowing, but we really try not to advocate bypassing the electrical system with jumpers, especially if the motor is still under warranty.
It I were going to test this, I'd get a small gage wire, put a 3 amp fuse link in it, then jumper. The purpose would be to feel the fire, see if it's getting hot. If so, then your right, he has a short somewhere.
You may know that the test you just described is safe for someone familar with electricals and the safety and expense in protecting the mpem and ecm....but others may not be as versed in it as you. If they forget something, then you or one of us may have to share the burden of burning up their mpem..........:cheers: