Hi, Sfooshee!
The electrical switch part of the brake fail warning assembly (assuming
that it's the same as the "brake differential pressure switch") is not
designed to be leak proof. If the mechanical part of the assembly is not
leaking internally, then the switch should never see any brake fluid.
Fluid leaking out of the switch indicates that the rubber o-rings on the
shuttle valve inside the assembly are leaking and need to be replaced. The
o-rings are only about 1/4 - inch in diameter, and you may be able to find
replacements locally, although you would need something that is resistant
to brake fluid.
After a new switch I bought leaked immediately, I finally figured all this
out. By that time, I had had enough of trying to get all five brake pipes
back into the assembly and wasn't going to remove it again. So, I just
found a bolt that would screw into the switch hole and stop the leaking. I
figure I will know if my brakes fail without having to depend on the
warning light, at least until I remove the assembly again.
Steve Byers
Havelock, NC USA
'73 Midget GAN5UD126009G "OO NINE"
"It is better to remain silent, and be thought a fool
than to speak, and remove all doubt" -- Mark Twain
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> From: sfooshee <fooshst@stumail.gc.cc.fl.us>
> To: spridgets@autox.team.net
> Subject: brake press switch
> Date: Monday, July 05, 1999 12:06 AM
>
> Greetings, list. I've got a problem with the brake differential
> pressure switch on my MCMLXIX Mk. IV Sprite. The device hasn't worked in
> the 3 years I've had the car, and it now leaks out the electrical
> connection. I've looked for replacements somewhat cheaper than the
> switch itself with no luck, as the rear two connectors are smaller than
> 1/4" and apparently not in use by pipe fitters or plumbers :(
> If someone know sa good source for replacements (doesn't have to
> work, just not leak), or has one lying in the parts bin for sale, it
> would be appreciated. TIA.
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