Brakes Front brakes heating up, pressurizing fluid, pedal stays up

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MRaburn

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Nov 29, 1999
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I'm back fellas.... :/

Ok I have everything reassembled. The right side release now but still feels very tight and I actually think the rotor is warped from being cooked during the initial lock ups... the paint was cooked off. These were Stoptech blackhat slotted. I have some smooth steel ones in the box I will place on and this probably will resolve the issue.

But now Im stuck in the brake lights wont go off. I have taken the switch on and off, and even a new switch and still problems. I saw an old thread about someone saying they had the black bushing in wrong, Im wondering if it's worn out and too thin to keep the stop switch from activating? I'm at a loss on this one.

The end of the booster rod, the flat surface seems like there is more thickness to it than the factory one, which I have thrown away already. Its about a fat 1/4" of metal before the pin hole.

Thanks for any input.

Mike
 

MRaburn

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Well yes and no. That picture is for a Cougar I read, so the switch actually goes with the open 'hook' end going down, not up, else the switch would be facing the firewall. I see LMR has a bushing kit, if the thickness was wore out then maybe it was cause it to be engaged all the time?
 

MRaburn

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I can pull the pedal up all the way, doesnt turn off. If i take the switch off the pin the lights go out. It is such a tight squeeze to get it on and once i have it on the pin the lights come on.
 

MRaburn

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I ordered this Cardone one from Rockauto, you had suggested this brand... check the photo. The rod has to be spun 180 to get to go on to the pedal, so it points down, else its too high. Thoughts? IMG_1092.png
 

Mustang5L5

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Pointed down is the correct orientation.

even though the switch is upside down, the top photos is still correct. Nylon bushing on the inside, black bushing in the booster rod and then “hang” the switch over the rod. The switch should sit butted up against the flat of the booster rod. If it’s cocked at an angle it will be constantly activated.

Anyway to get a phone up there and snap some pics to try and see why it’s not sitting right? Hard to really guess. Those things are a PITA though as I just did mine a few weeks ago.
 

MRaburn

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Sure Ill take some pics tomorrow. My gut tells me the end of the rod just has too much metal thickness that just activated the switch when installed. I've rocked it etc. I dont have the inside bushing, because I have a black bracket slipped on the end that is the cruise control vacuum switch which acts like the spacer on the inside. I saw an older post where you were helping a user and he stated he had the black bushing in wrong and Im not sure how you can have that in wrong and it fixed his lights always on problem.
 

Mustang5L5

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The black bushing can only go on wrong if it’s on the wrong side. It has to go on the outside, away from the brake pedal, and be on the closed side of the switch. Putting it the other way can cause it to jam up.

only pic I can find showing what I mean. Too cold to go into the garage and take a pic. I can do that tomorrow.

77612C48-F667-41FC-AE9A-E193AD6229EB.jpeg

also here’s my Originsl Ford booster to give a reverence on the backside flat. I think I have some pics of my Cardone m-2300-k booster around here somewhere too
9C7754B6-5DF4-41A9-9790-2C4B111851E2.jpeg
 

MRaburn

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Here is me installing it again (10 times now, who designed this struggle at Ford? I wanna shoot him, lol).

You can tell its hard to get on, I have to force the brake pin through the switch which makes me think the end of the rod is too thick. I measured it with calipers, it's exactly a 1/16th thick. What is your old one?

Not sure what to do at this point. Could rig something up at the cruise vacuum switch area.

Full size image here...

Im wondering what that is right at the back side near the pedal rod that might be pulling the notched side back engaging it. I can tell what that is, maybe the part of the vacuum switch bracket that acts as the washer.

IMG_1093.jpg
Mike
 

MRaburn

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OK screw it, I took out the black spacer and it works as expected. Not sure it's long term solution but there is no play in the pedal and I can move on for now, my back is killing me! LOL. That tolerance must be tight and the end of my rod is just too thick I think.

Mike