I hooked up to a box yesterday and plug in the 7 way and all my lights shut off, I changed 3 fuses two trailer accessory fuses and one truck turn signal fuse. Turn signals and brake lights work fine but I have no headlights or marker lights, and no lights in the cab and cigarette lighter doesn't work, when I turn the lights on only the right headlight is on , when I hit the the high beam switch all the lights turn on outside and in the cab as well as cgi lighter when I let go they all turn off,