F150 Tail Light Wiring - Schematic Wiring Diagram • - In case you're studying 12 volts at the socket with a multi-meter, then the hassle is with the floor, if you touched a steel part of the vehicle while contacting the lead within the socket. If you have trouble locating where the tail lighting fixtures ground, let me know. I have a shade coded wiring diagram across the residence someplace for the 2010 f 150. Thanks, the floor appears to be the subsequent most in all likelihood option. Argh i did use a multi-meter it crimson a chunk over 12 volts at all of the light sockets, it also showed that the blinker relays paintings first-rate. Use a multi-meter or a 12 volt circuit tester with a light to check for energy to the mild sockets within the rear. Test in the socket (wherein the light makes touch with socket and additionally on the rear of the bulb sockets wherein the wires enter the socket. Sockets are acknowledged to head terrible. Although when you consider that all the lights are out i accept as true with the trouble can be with the floor. Discover the floor location for the rear lights and check for a good contact. You could additionally test the floor with a multi meter. The new could have a video to show you the way. Rear lights, brake lighting, flip signals, reverse lighting and risks now not working. Additionally registration code lights. The most effective mild within the again of the car that works is the shipment light. All the front lights paintings together with dangers. The fuses appearance best i checked lots of them some thing having to do with lights. I checked electric connections as i accompanied the twine bundle as much as the fuse field i failed to see any that seemed lose or in poor situation. The handiest one which appeared warn changed into above the spare tire, but it appears to make connection and the pins look adequate. I checked most of the bulbs they may be first-rate up to now however ought to one defective bulb motive this? What am i lacking?.