Thread: brake lights not staying on..

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Sorry, I posted then went out to work on the car, but scattered showers prevented me from looking closer at this. I have discs front and rear (GM metric discs in front with '97 Camaro discs in rear). The MC is under the floor with a residual valve in each line as well as a proportioning valve in the rear line.

Louey - the pedal isn't really low, but pumping does seem to build some pressure.

I'll probably start by bleeding and also try and do a better job bleeding the master cylinder since I don't have good equipment to do that. I will try bleeding the switch too and hopefully that will fix it, but I won't be back on it for a couple weeks. Next time I'll probably get a mechanical switch. The guy at Speedway reminded me I need the switch when I was ordering all my brake parts and thinking back a mechanical switch seems more reliable. Thanks guys.

There have been confirmed cases of some early through the frame fittings creating air traps that cannot be bled out. If you have those fittings you might keep that in mind if normal bleeding does not get rid of your spongy pedal.