i want to add turn signals to my cart, but dont want the $100.00 price tag. what i want to do is just use a on-off-on switch, and 2 seperate flashers.. the problem is theres only 2 wires on my taillights one for brakes, and one for running lights. how do i wire the signals in with the brake lights?? any help appreciated. mabie something with diodes? just need some guidence