Bad master cylinder keeping brake lamps on?

[ironhead]

Just bought a 90 accord DX for my son for $500 bucks. Car runs great and looks pretty good. the guy I bought it from says that the brake master cylinder went bad and let the brake lights stay on which killed the battery. The master cylinder is bad and the battery shot. Is the sensor in the master cylinder cap for the brake lights? Or is there another sensor / switch I should be looking for that lets the brake lights stay on.

Thanks

Ironhead

[avaaj]

I don't think its a brake master cylinder.
More like a switch or fuse

[Losiracer2]

sometimes the BRAKE light stays on when the fluid is low, so check that first.

[TypeG]

there's a small rubber plug on the top of the brake pedal that pushes the lever in on the brake switch. when it get old and breaks, it no longer pushes the lever in on the brake pedal switch. this causes the brake lights to stay on. check for the rubber stopper on the pedal. it should be blue if it's there. if it's not you might just see a hole where it was, there also might be pieces of it on the floor board. the updated plug from the dealership is white and costs about $2. later.

[wed3k]

the rod can be adjusted so far foward that it may actually apply the brakes?

[ironhead]

the rod can be adjusted so far foward that it may actually apply the brakes?

What rod

[wed3k]

for the brake master cylinder. it's int he brake booster.