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Not DYI? take it back to the shop that did the work. Otherwise, tripple check your work, one of the links in the chain is a problem in the haystack. I like to use one of the new very bright Led lights in the dark to trace problematic wiring. Corosion at connections can cause bad behavior. Connections need to be clean to bright metal on both sides which may require scrapping eith a sharp tool or knife.
is it just the brake lights or the tail lights when the headlights are on? the tail lights may have a double filament bulb one lights up when brake is applied and the other filament is for just tail lihts so check the bulbs carefully and if you see one filament is broken replace the bulb. also make sure the socket where the bulb seats is not corroded or dirty
It could be a bad switch. if the blinkers dont work then it could be a bad multifunction switch or flasher relay. If the brake lights dont work it could be a bad break switch (located under the dash above the brake pedal). If its just the running lights could possible be the wrong kind of bulb. If nothing works at all it may be due to bad light sockets.
Make sure you have the switch adjusted properly....If you remove the switch without unplugging it
the brake lights should come on....You have to have the brake light switch button placed in perfect position so when you mash pedal the switch button will release from switch causing the lights to come on.......Be sure the bulbs are not burnt out.....just for a test turn switch on and remove switch from pedal area without unplugging it to check for brake lights........If they are not on check bulbs..........
Not even the third eye? then the fuse is blown or all the bulbs are out or the brake light switch on the break pedal is bad wire off or broken( it breaks right off the plug then crosses then blows the fuse as the loose broken wire hits the brake pedel arm. Test the break pedal switch first if the third eye doesesnt work either. no power with a test light the fuse is blown or the wire broke ( the wire goes straight to the switch from the fuse and doesnt go anywhere elese. the other wire if hot should light the lights. Most of these wont come out of park without this working as the wire also turns on the park release but some Fords the park release sticks released and Ford made em that way as they didnt like the brake to get out of park law. If the brake lights dont work maybe you ought not be able to get out of park anyway till its fixed. the switch is hot on both wires with the switch pused down and the lights dont still work go after the third eye first if the bulbs are bad change em before you do the rest of the work. on cars with yellow turn signals the brake lights all work on the same wire but red only use three wires, but you didnt say the turn signales didnt work if they work and they are red you r on the way to the turn signal switch as the brake switch powers the turn switch with power then it splites it fot the two lights and adifferent switch circuit for the front hooks them all together for hazard. yellow turns in the back or even separt bulbs can mean blown bulbs ther too its old enought for all the bulbs to fail and the runs still work.
I have a 2001 Ford F150, my brake lights dont work. Ive replaced the bulbs, checked the fuses,and the brake switch on side of the brake pedal was replaced. I still dont have any brake lights. My third brake light works fine, along with my running lights,flashers, blinkers.
do you have a 3rd brake light like on that is on the roof or in the rear window? if so does it work?
the brake lights are usually a 2way bulb so just because the lights work doesn't mean that brake lights will. if the 3rd brake light works replace the brake light bulbs if none of them work including your 3 brake light. check into having your brake switch changed. that is the switch under the brake pedal. when it is pressed the brake lights come on and when released they go off. if the bulbs do not fix the problem than try the switch.