Well, I just opened up my grip to see what the motor was doing - and it turns out you all were right. The wiring was crossed!
Y...A..yy... uh
Pulled the trigger, motor turned on and pulled the spring for fraction of a second.. Then stopped.
Opened up my grip once again, and hey! What do you know, a wire was in the way of a gear and got RIPPED Open..
Guess I'll be sending it in for repairs..
.. Or just buy a new wire or somethin.