NO BRAKE LIGHTS

The quick flash is an indicator that the rear isn't working. If you take a test light to the brake / signal socket, do you get power? If not, you need to follow the power wire until you find a break in it. Keep in mind, if you follow the wiring from the tail lights, I believe there is a plug-in to another wiring harness that could be corroded, loose, or damaged.

Here is a wiring diagram to help you see how the system works with a guide to help you test

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (Below). Please let us know what you find.

I have replaced my rear brake light bulb, but it still will not work when the brake pedal is pressed. The blinker and reverse light does work though.

Hi there,

If it is just one that is not working, you will have to start checking the power wire down the loom, often it is a faulty globe holder, check the earth as well and if both are not working, check the switch at the top of the brake pedal.

Mark (mhpautos)

1997 F-150 4.6L auto transmission won't shift out of park and brake lights are out. Fuses checked out ok. Using a wiring diagram to try and locate and inspect brake pressure switch and brake on/off switch but having problems finding. Don't have equipment to test ohms or resistance, just planning on replacing both switches to see if problem goes away. Can someone help with this? Could this be something else?

Do what you intent to do-and also check the shift lock control solenoid-Location follow the brake pedal till it meets up to the brake support bracket you'll find the switch here-check the adjustment/condition before replacement

Electrical problem
1997 Ford F150 6 cyl Two Wheel Drive 78000 miles

Both of my brake lights stopped working suddenly. My high rear brake light also does not come on. The parking brake light does not come on when the brake is activated. I've checked the fuses and they are all good.

since the high rise light isnt turning on also i woudl suspect a faulty brake on off switch or one that is improperly adjusted.

if it was wiring or a bad turn signal swtich the thrid one shoudl work and not the other ones, and vice versa.

The brake lights are not working when I press the brake pedal. All other lights work, just not the brake lights. Can you help please? Thanks Jason

Jason,

If you are sure the bulbs are good and you checked and there is no power to the sockets, check the brake light switch on the top of the brake pedal. It may be out of adjustment or bad. Let me know if you have specific questions.

Joe

Brakes problem
1994 Ford F150 6 cyl Two Wheel Drive Automatic

We replaced the rear brake lines as we had no brakes, bled them, now the lights only come on with hard pressure to the peddle.What do you think the problem is now?

SoI understand, is it the brake lights on the exterior of the truck or the brake light inside (warning light) that only comes on when you press hard on the brakes?

Let me know so I can better help/

Joe

It is now fixed, I had to get a new brake light switch

Hi, all the other lights work. The key is not in. The truck does run. I have unplugged the two plugs at the rear bumper to the rear lights, the mufti-function switch on the steering wheel, the 21 pin plug going through the firewall and the headlight switch. There are two plugs at the bottom of the steering wheel. The one plug that turned off the lights in the cab, I left plugged in. I was told it's a bad ground. I have cleaned the two ground at the kick panels. It blows fuse number 13 when I press the brake. What are some things I can check next?
Thanks, Mike

check for a short in the wiring going to the brake switch then to lights. probably along frame or where it goes under truck. check ground at center rear cross member and probably rear of truck. also org/lt blu and lt grn/org wires for lights. that is more than likely your problem.

I checked there are no grounds wires under the truck. Does it help to unplug all the plugs? I plugged everything back in and I found the one that causes the fuse to blow.

then trace the wires going to that plug it has to be hitting someplace.

Thanks, the plug has four wires, and is located in the center of the dash. Do I trace the side that doesn't have power because it blows the fuse only when it's plugged in? With (everything) unplugged except for this plug and the plug at the bottom of the steering column ( which controls the ceiling lite) it blows the fuse.

ya test it where you found it get a circuit breaker from auto parts so power will go off and on if you have a small compass run it along the harness to find the problem area. I think it's your wires for lights in back.

Thanks I got a new turn signal switch which fixed it, thanks for your help.

Brakes problem
1991 Ford F-150 V8 Automatic

why do i have no brake lights but i have all my other lights including tail lights

I'd have to check the feed to and from the brake switch. The feed from the brake switch goes through the multifunction switch.

yes a fuse circuit breaker a 20 amp one will be sufficient where it won't damage anything. auto parts should have that

Thanks, the connector that I found has four wire colors that don't match the fuse circuit I'm on. How could this cause my fuse to blow and not other fuses?

because they change color sometimes going to another area. I think you should have a pro do this . I have no further comments or suggestions.

thank for all your help!

The brake lights work with the left signal on but they will not work with the right signal on and the bulbs are good. Any suggestions?

That is the classic symptom of a bad ground on the right side. If I am right, the right bulb will not work at all if you remove the left bulb. Current goes through the right bulb, cannot find the path to ground, so it goes through a different filament, then over to that same filament on the other side, then to ground over there.

Usually this symptom involves a brake light and a tail light in a single bulb with a common ground. If your truck uses the same bulb for the signal and the brake light function, the signal switch is also a good suspect.

i have a 1989 ford f150 xl lariat my tail lights dont work and neather do my brake lights but my directionals work fine they wont turn on at all

Did you check applicable fuses? Use a voltage tester. At the rear, the brown wire is voltage for tail lamps, goes hot when you turn on the headlamp switch. Black wire is ground. The other wire is voltage for stop and turn, they use the same bulb filament, just not at the same time.

i have a 87 f150 im the one that ask bout it not comming outa park.
I have another problem with it and many others ... 1st i have no brake lights i have replaced fuses and flasher that got the blinkers working but the brake lights still will not i have replaced the bulbs as well nothing again im thinking it in the wiring itself but have no clue how to fix it or know where to begin
.
2. when i start the truck i have to keep foot on pedal for bout 5 mins before it will stay running
3 when at a stop or just taken off it likes to cut out
4 when i hit the gas at times it doesn't wanna come outta of 1 until like 45mph i have checked all fluids filters i also have a holly 4 barrel carburetor on it it has a 351 Windsor i thought the orignal motor was fuel injected but this one isnt if any one could help i would greatly appreciate it thank u to those who can help

thank u

for brake lights try trip switch on brake pedal. test for juice in, and out when pedal pressed. if it has juice in but not out it's bad.

ok thank you i will do that would u hapen to know bout any of the other problems

i have a 84 f-150 with a 460 brake lights work till i turn on the headlights and blinkers dont work at all. i replaced the turn signal fuse plug just wondering what would the problem might be?

My first thought is the multifunction switch has a problem. You can also check for voltage and ground at the rear.

The diagram should be for left rear. Brown wire is voltage for tail lamps, black is ground.

thank you

Let us know what you find.

Double check that you have the correct bulbs and you have a good ground for the tail lights.