There are some old 12/24 motors out there that have 2 red and 2 black wires (12 VDC each) going to a switch on the foot pedal. The switch is used to select 12 or 24 VDC. Guess I'm showing my age.LOL If you google "old 12/24 trolling motor connections" you will see several variations. So you need to be very sure of what you are working with so you don't have any melt downs causing a fire.