Most riding lawnmowers and tractors come with a factory-equipped safety mechanism that prevents the operator from putting the machine in reverse while the deck is down and/or the blade is engaged. This safety feature is designed to prevent an operator from cutting without having a full visual of any obstacles behind him. This safety switch can be bypassed on a riding mower with only a few tools.
Lift the hood of your riding mower and disconnect the battery cables, starting with the negative post, with a ratchet and socket.
Locate the safety switch near the negative post of the battery. Look for a plastic harness with wires.
Grab both the plastic harness and wires and unplug the wires from the harness by hand. If the wires will not come off by hand, use pliers to disconnect the wires from the harness.
Use the ratchet and socket to reconnect each battery wire to its post, starting with the positive or red cable, then lower the hood of your riding mower.
Sit in the operator's seat. Insert the key into the ignition and turn on your riding mower. Lower the deck and engage the cutting blade then put the tractor into reverse to test its operation.