[RyanN]

This isn't going to help much, but it shouldn't matter if the motor is shorting to the frame. The cRio and the camera should be insulated from the frame.

Check the resistance from both the positive and negative terminals of power distribution board to the frame. The resistance should be really high or at infinity if everything is properly insulated, preferably infinity... but moisture can cause some the resistance to go lower.

This is exactly one of the reasons why everything is supposed to be insulated from the frame.

If you find the resistance to be near zero or at zero, then you definitely have a grounding problem. Start pulling fuses and ground wires until you find which one is causing it (Hint: Try the cRio and camera first).