Ford f150 tail lights not working

sounds likely to be a relay blown so is giving constant supply to headlights and affecting rest of lighting system not sure of location on this vehicle but a google search will tell you if you dont have workshop manual

with no dash lights check the bulbs inside the rear of your dash.if bulbs ok . then send it away to a dash repair place found online.

I would check for power at the fuse. Odds are the problem is the headlight switch, or possibly in the wiring. I would get a wiring diagram and put power to the wires at the headlight switch that go to the tail lights, and dash lights. If the lights come on then the headlight switch is probably bad.

If the tail lights and the dash lights stopped working and the tail light and the panel lighting fuses are both o.k. and you can find no other blown fuses then the problem is most likely the headlight switch.

Hello! You probably don't want to hear this but...Take your dash apart until you can view all connectors. Find the brown lead in the headlight switch connector...This lead feeds tail/turn signal lights..With key on...Turn on headlight switch and check for battery on brown wire...If there is no battery...Turn off key...disconnect negative battery terminal...Using an ohm meter set on the X10 scale...Trace lead back to fuse block; you are looking for an open. Check the fuse (15amp).

Next check that dash has a solid ground connection to the body.

Keep me informed via comments.

Guru.................saailer




I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

there is a relay for those as well in the fuse box test the fuses for those tail lights and if they dont have power then its the relay.

check all fuses again under hood and under dash if all are ok suggest you replace headlight switch ;also
check dimmer switch for dash

I’m happy to help further over the phone at https://www.6ya.com/expert/gregory_8e6ba270263743ac

No. All those lights are on the same fuse and are controlled by the headlamp switch.

Make sure that the fuses were all checked on the fuse panel inside the vehicle under the dash. That is where the fuse for those lights is.

probab;y a faulty ground problem.

Rusty Did you receive the diagrams I sent? Park lights and dash lights are on the same fuse and circuit.