Brake pressure warning switch Options

[SVG223]

In the middle of rebuilding/bleeding the brakes and the parking brake warning light is flashing while doing test drives and won't shut off. After checking the parking brake switch I do a little research and read about the brake pressure warning switch on the master cylinder which has a reset button. I'm thinking about how often I might have to reset the thing before I'm done with the brakes. What about cutting the wire to the switch until I decide to rebuild/replace the master cylinder, then reattach it? I don't think I need a flashing light to tell me that I have low brake pressure, that should be obvious.

[Dave_Darling]

Many of the switches are latching, so even when the shuttle moves back into place it still grounds the single contact (or bridges the two contacts together). Those must be reset by pressing the button on the switch--usually it's covered by a rubber cover.

Some switches are not latching, so when the imbalance goes away and the shuttle re-centers itself the light goes off. I believe that those are replacement switches.

--DD

[GregAmy]

Many of the switches are latching, so even when the shuttle moves back into place it still grounds the single contact (or bridges the two contacts together). Those must be reset by pressing the button on the switch--usually it's covered by a rubber cover.

Ah hah! I've often wondered about that, as I've read here about that button but none of my cars (or replacement parts) ever had them. I learned something cool today...

And that latching makes total sense, since you want the driver to know that there's a mechanical problem to be addressed. I guess it was easier (and cheaper) for manufacturers to make the switches simpler (and cheaper) and hope the driver figured it out... - GA