Expert 2012 F150 Tail Light Wiring Diagram Amazing 2012 Ford F150 Supercab Interior Light Wiring Diagram Dome - Use a multi-meter or a 12 volt circuit tester with a mild to check for electricity to the mild sockets inside the rear. Test inside the socket (where the light makes touch with socket and also at the rear of the bulb sockets in which the wires enter the socket. Sockets are known to head terrible. Even though considering all the lights are out i agree with the hassle may be with the ground. Find the ground vicinity for the rear lighting fixtures and check for an awesome contact. You can also test the floor with a multi meter. The new could have a video to reveal you the way. Rear lighting, brake lighting fixtures, turn alerts, reverse lighting and risks no longer operating. Additionally registration code lighting. The only light in the returned of the car that works is the shipment light. All front lighting fixtures paintings which includes hazards. The fuses look high-quality i checked lots of them some thing having to do with lighting. I checked electric powered connections as i observed the wire bundle as much as the fuse field i failed to see any that regarded lose or in bad situation. The most effective one that regarded warn became above the spare tire, but it seems to make connection and the pins look adequate. I checked most of the bulbs they're best up to now but should one faulty bulb reason this? What am i missing?. In case you're analyzing 12 volts on the socket with a multi-meter, then the hassle is with the ground, in case you touched a steel part of the automobile while contacting the lead within the socket. If you have trouble finding in which the tail lighting fixtures ground, allow me understand. I've a coloration coded wiring diagram around the house somewhere for the 2010 f 150. Thank you, the floor appears to be the following most probably choice. Argh i did use a multi-meter it crimson a piece over 12 volts at all of the light sockets, it also showed that the blinker relays paintings pleasant.