Thread: Under the floor Master Cylinder - how to mount brake switch?

Tweet

Fwiw, nothing wrong with the hydraulic switches if you run regular brake fluid.

Run silicon fluid - as I do - an the silicon fluid will seep into the switch area and electrically isolate the contacts one from the other and they won't work until the pedal is pushed hard enough to lock the wheels.
The mechanical switch cured that problem.

Incidentally, imho there is no such thing as a low pressure hydraulic switch.
They're all set to close contacts at about 7#.



Here's a pic of a similar brake arm return stop in my 31 on 32 rails roadster project to give you an idea of what you're looking at in the above pic.