i have one camera and work both way back and front, i connect some diodo and work fine, the diodo is for have the current of 12 volt in one direction. lioke when you shift to reverse, the diodo what thats is when you shift back to go forward that way you prevent the white light to light up. you dont want that to happen, i hope you understand what i trying to explain to you my inglesh is no so good but i did and you can too. thanks