Hi all. Could anyone help me design a circuit to help me fit a reverse switch to my sons converted mobility scooter into a go cart. At the moment it is forward only. A press button opperating a 40 amp relay to send the power to the motor. the max currant draw is 40 amps and 12v dc. I have a 10amp 6 terminal, 3 posision switsh and 2 more 40amp relays to use. Just need to reverse the polarity of the motor with out burning out the 10amp switch. Any help would be greatly appreciated. Thanks.