I have a 69' F100 and I am having an issue with the brake lights staying on. I had a blown fuse so I replaced it and now when I turn the truck off the brake lights stay on. I have to pump the brake in order for the lights to go off. Does anybody know why it would do this. They work fine and dandy except for we I turn off the truck.

 

Do they go off if you pull the brake petal up with your toe, if they do, you may have to adjust the stop light switch closer to the petal. If thats not the problem you may have wires bare and shorting under the truck along the frame.

 

^ Ditto, 9 times outa 10 it's the switch.

 

I have the reverse problem, My Brake lights want come on!!!

 

The brake light switch screws into the bracket on the pedal. If it comes loose, it will then not push far enough to open the contact and shut the lights off. Take a look and you'll see what I mean. It's a grey plastic push button with two wires.

Mine was like that originally. Someone previous had put a small hose clamp on it to hold it steady(threads are stripped on switch). 25 yrs and still going strong.

Smoke, either your switch is stuck or unplugged? How's your turnsignals? Ok, then it won't be a turnsignal switch issue.

 

I have had to put a nut on them before. Not sure of the thread size. Hose clamp should work fine.

 

There is a swith on the brake pedal and it was loose. I adjusted the switch and now they turn off. Does anyone know where the reverse swith is? I noticed I don't have reverse lights.

 

Probably right on top of the transmission If it's a 4 speed, part of the neutral safety switch if it's an automatic (under the dash on top of the column), not sure with a 3 on the tree but I think it;s under the hood on a little bracket right by the shift linkage.

 

Turn signals ok!!!

 

Fixed it for you.

The 4 speed switch location varies on the shift tower, as it depends on whether the 4 speed is a Warner T-18 or a New Process 435.

Note: 1967's use a different stop lamp switch and brake pedal mounting setup than 1968/72's.

 

I have a three speed on the floor. (auto c4)

 

I'm having this same issue right now, when i got the truck about a week ago they told me they stay on and they keep a metal bar in the car to push against the firewall and lift the brake pedal up. I have yet to even look at it because im cleaning out the garage first but thats some good info about the switch, can I tighten the hinge the brake is on to lift it higher? Or does it just kinda sag like that usually?

 

I replaced all the fuses and did a OPS check, all are operational. I just replaced brake switch after checking if there's power, one side of the connector is hot and the other isn't, this should be the norm. Went ahead and connected the switch and there's still no brake lights. The only thing is I replaced the steering collar because the shifter handle retaining pin section was wallowed out, which created allot of play and fixed the horn. Could there be an disconnection from making this repair? What's the answer guys?

 

My brake wasn't making enough contact with the switch, so I just added a small rubber bumper, the types you find on the bottoms of laptops. Worked perfect!

 

Mine stayed on but it was because the clutch pedal was being lazy and not coming up all the way. Had to adjust clutch and it fixed it for awhile. When I did new clutch it fixed that lazy pedal (so far)