• 2 Vote(s) - 3.5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Brake light pressure switch problems
#1
my brake light pressure switch is leaking fluid out of the center, where the wires go, when pressure is applied to the pedal. bought a new one from ford but its doing the same thing! anyone had this happen, how did you fix it?            
  Reply
#2
I just found that mine is leaking too. Trying to get the front brakes bled is about the last hurdle I have left and I keep getting air. Discovered the leak from the pressure switch. Does anybody know if this switch is exposed to brake fluid or is it supposed to live in a dry environment pushed by a pressure valve?Huh
  Reply
#3
Yep...had the same problem. It is not the switch that is leaking but your proportioning valve. You need a rebuild kit from... https://www.musclecarresearch.com/valve-kit-kh

I installed the kit on mine and leak went away.

Jeff
1972 Q Code Convertible
1973 Q Code Mach 1 Ford Marketing Sales Vehicle
  Reply
#4
jeff8877;235289 Wrote:Yep...had the same problem. It is not the switch that is leaking but your proportioning valve. You need a rebuild kit from... https://www.musclecarresearch.com/valve-kit-kh

I installed the kit on mine and leak went away.

+1 thumb
  Reply
#5
Thanks, that is what I was afraid of.
  Reply
#6
computercarguy;235291 Wrote:Thanks, that is what I was afraid of.

I did the kit and now mine is leaking at this spot. ? Does that mean I am too incompetent to rebuild a proportioning valve?
  Reply
#7
http://mustangparts.averagejoerestoratio...A_320.jpeg

might try a different type i belive 69 and 70 are the same as 71-73
  Reply
#8
Brake fluid is leaking past the O-ring seals on the ends of the piston in the center bore of the proportioning unit.

   
  Reply
#9
Bill73Ragtop;266702 Wrote:Brake fluid is leaking past the O-ring seals on the ends of the piston in the center bore of the proportioning unit.

With the new seal kit is there any chance this will go away with a few cycles of the brake system/pedal, or do I need to just buy one of the Daniel Carpenter reproductions that are out now?
  Reply
#10
I rebuilt the distribution valve on my 69 and there is no leakage (there wasn't any to begin with) so rebuilding it will not hurt it. I think new O ring seals should work unless you have damage to the bore. Rebuild kits are cheap so it's probably the way to begin. BTW - be sure to get the 'Centering Tool' which is helpful during the bleeding process.
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  I fixed my emergency brake today downwardspiral 3 191 06-19-2018, 05:32 PM
Last Post: downwardspiral
runninpony Russell SS Brake Hoses NOT A T5 4 254 06-06-2018, 12:04 PM
Last Post: Hemikiller
  Reman Power Brake Booster Slack. 72 H-code 9 234 06-04-2018, 11:13 AM
Last Post: 72 H-code
  Soft Brake Pedal (Circle Track Mustang) jdwest711 16 334 05-23-2018, 11:47 AM
Last Post: Don C
  Brake Fitting size needed jowens1126 5 216 05-13-2018, 08:46 PM
Last Post: jowens1126
  brake drum retainers F-579 1971V8 11 390 05-11-2018, 09:28 AM
Last Post: red351
  front disc brake conversion nailpounder 16 781 05-04-2018, 08:37 AM
Last Post: Stanglover
  Chrome brake booster Christopher Pawlina 2 240 04-24-2018, 03:40 AM
Last Post: NOT A T5



Users browsing this thread: 1 Guest(s)