I recently added a power brake booster to my 67 F250. I posted the pics of what I did here: https://www.ford-trucks.com/forums/9...version-2.html

One of the problems I encountered was the brake switch, it would not fit on the new rod that bolted to the brake pedal. The new one was too wide and just too big for the switch to fit around it the way it was on the original set up.


So I just ran the 2 wires out the firewall and put a pressure switch on the master cylinder. Now the brake lights do not work. They worked fine before. Basically all it needs to do is complete the circuit right? I touched the 2 wires together and the brake lights still did not come on. What am I doing wrong?

Maybe I should go back to the way it was, is there another switch that will fit the new set up?

Thanks,
Wade

 

ok electrical really makes me warry LOL i am a carpenter not a sparky. but in the interest of trying to help...

ok the pressure switch you used what is made to be used for a brake light switch for your set up ie did it come off of or supposed to go on to YOUR brake booster pedal combo?

secondly actually all that is needed for your brake switch to do is kill an always hot connection just like your door switches. they don't turn on your brake lights. so to speak they turn them off.

thirdly if you had a working brake switch already instead of using the new system just go back to the old system. if you haven't uped your voltage/ wattage/ current what ever then the old switch is just the ticket to my eyes since all the wires are the same.

*note please don't take any capitalized letters as yelling just stressing the word*

hope it helps and if i am wrong please correct me especially if i misread your post.

 

Wade;

From the schematic, it should be as simple as closing the contacts to turn the brake lamps on. The pressure switch idea should work, as long as it's normally open, and closes with pressure.

You are aware that you need to have the ignition on for the brake lights to work, right? The circuit goes through the turn signal switch.

 

You don't normally need the ign sw on for brake lights. You have to have a hot(12v) wire present at the input of the normally open switch so when you depress pedal it makes the circuit complete to the brake lights. The brake lite circuit does go thru the turn signal, but it's passive. The turn signal when applied just redirects that side thru blinker.

 

Thanks for the replies, when I get some time this weekend I'll take another look at it. I will find out the application for the new brake light switch. it is one the guy at NAPA grabbed off the shelf saying that would work. The factory switch will not fit on my new set up. But maybe I could do something different to use another mechanical switch.

 

Wade, Touching the two wires should light the lamps. Some of our trucks do have to have the ignition switch on to have current, mine does.

With the switch on and there is no power to one of the wires, I would start looking at a blown fuse next.

With everything plugged in do you have turn signals on the rear?


Another thing, you may have to use a 73-79 switch under the dash on the pedal arm to light the lamps. Who cares where it is as long as the lights work, right?




John

 

The 1967 is a one year wonder for a heck of a lot of things as this truck was built before the federal motor vehicle safety standards went into full effect. There was a lot of design changes between 1967 and 1968 due to this.

As Jo Wilker suggests I would get a Brake light switch from a 1968-1979 truck and put it on. You will have to find a way of putting a bracket on the pedal to activate the switch though.

 

ok i just reread the op's post i think i have a solution .

67-72 brake pedal assemblies were all the same it wasn't until 73+ that they changed right?

well if that is the case why not just hit a junkyard or look for some one doing a manual to auto or auto to manual and snake their brake pedal assemby. then you would have one with off the shelf replacement parts instead of trying to rig

submited for consideration

 

No, they aren't. 67's are unique. I put power brakes from a '70 on my F-100 and had to swap in the '70 pedal, pedal bracket, and brake light switch.

 

ok allow me to restate sorry it came out wrong.

67-72 brake pedal assemblies can be swaped between the years just by removing and installing no modification needed right?

i hope that clears up the statement.

 

here is what I found on another site:


1. '73-'79 pedal pivot brackets will NOT bolt up into a '67-'72 truck without major dash modifications.

2. '73-'79 pedals will not easily fit the '67-'72 pedal pivot bracket.
Some grinding can be done to make the the '73-'77 pieces fit, but the '78-'79 pedals will just plain not work.

3. (Some) '78-'79 power brake boosters will NOT fit '67-'72 trucks. The '73-'77 versions will fit just fine.

4. '78-'79 power brake boosters will only fit '73-'77 trucks if the '73-'77 brake pedal is also used.

5. 1967 trucks use a one-year-only pivot bracket and booster combination.

So...here's the final verdict for '67 owners. If you're wanting to install a power booster on your '67, here are your options:

1) Use the '67 Bendix-style brake booster with your '67 pedal assembly bracket; or
2) Swap a '68-'72 pedal pivot bracket into your '67, and then use a '68-'77 brake booster; or
3) Drop your '67 brake pedal out and weld a 1" extension tab onto the rear (towards the driver) edge of the pedal, drill a hole for the booster rod, and then go ahead use the '68-'77 booster.
...
If I would have read that first before starting my project, I would have done option 2. Anyway, been busy all day, time to go out and fiddle with the ole truck now.

 

Wade you were given some warning: I have power disc brakes in my 66, still run the 66 manual shift brake pedal with a 76 brake light switch grafted in.

You are grown and surely can run all over the web and get confusing info, but this is the old Ford Truck Mother Church, the truth here will keep you freed up.

Some of what you posted in this post is crap.




John

 

which part is crap? I have no idea what I'm doing with power brakes just trying to learn and sharing what I've learned so far. I thought it would be easy to just buy a conversion kit from carolina classic truck and bolt it up. That's the way it was sold to me.. a direct bolt on. Supposed to be a very easy conversion without the need for a donor truck. I don't have the luxury of being able to bring home a donor truck. I just have to buy replacement parts as needed.

If I would have known that what they sold me was going to be a big pain in the *ss to get set up I would have bought parts at a junk yard from a '68.

But hey live and learn. I have absolutely no knowledge of these old trucks and no knowledge of power brake systems. So sorry if I offended you with my pathetic posts and my sheer ignorance. But no need to be rude.

 

Basically, the engine bay area is the same from 65 to 79, what fits in one will fit in the other. Pedals don't need to be swapped just the parts under the hood for the most part.

Rick started selling his brake setup for the mid 50s trucks 25 years ago. While it works the power disc is a better.

You don't have to bring a donor home, but you will need some place to work. With some planning you could have a donor completely stripped and hauled away in a couple weeks. Get everything ready to go in your truck and have it complete in a couple weeks.

You have to get "I can't" out of the way. I can't never did anything.

We have helped thousands of truck owners here with their trucks, we can help you to, if you listen.





John

 

meh if you have a bone yard near buy just tell the wife you are taking the truck out to go play golf *insert other suitible excuse here* *NO DON'T USE YOUR MISTRESS AS AN EXCUESE!!! GEEZE!! some people *
then take some tools and head out to the junk yard that has your 68-72 ford trucks in it spend some time standing on your head under the dash and pull out your newbrake pedal assembly. if you take your time on it then you will see / know how it goes into yours. at least this is option 1 and it makes the most sense.