No this circuit actully will not short circuit. It is a circuit that I have come up with using two relays to have three modes forward/brake/and/reverse.
if both relays came on at the same time you would have the same 12 volt + going to each side of the motor. and when both relays are off it has - 12volts on each side. When I get more time I will make a little diagram and post. In the mean time can anyone help me with my code. it may be simple for some I am new to the arduino IDE.