I have a small 12v motor 4 motors total each on identical set ups only the first one wired they are less than 1amp. its wired from a main power, to a pwm, to an individual power switch for the motor selected to a DPDT switch to switch direction. when the DPDT is wired power and ground input on the middle two post, no movement of motor. moving the power and ground to the top and bottom posts, I can make it turn cw and ccw in the off position, switching the switch the either side blows the fuse in them pwm. .