Car wiring diagrams: F150 Tail Light Bulb Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. and low for a wiring diagram to hard wire an under tailgate led light strip. turn lamps are on the same circuit not parking brake lamps..I need to know the tail light wiring diagram for a ford f FX. Put led bulbs in and clipped in the the load equalizers in both tailight .Otherwise if you use your tail light wiring you might pucker your bulb out warning system. This is the diagram for the trailer tow adapter..