Originally Posted by dandyd
Had to replace the Master Cylinder.....could not figure a way to bench bleed as the resevior had a hole on the opposite side for the tubing that ran down to the ABS system...had no way to plug that hole. Put it on the booster....attached the tube.....put plugs in 2 holes on MC with 2 clear tubes. Had my daughter depress the bake until no air bubbles. Bleed the lines at the calibers etc....Now when I start the car, the red "BRAKE" light stays on. The vehicle seems to brake fine, and the pedal feels normal. I've replaced this cylinder about 5 years ago and don't remember this problem. What'* up? Obviously, I fiqure I still have some air in the lines......re-bleed?
Sounds like you did it close enought to Right. That hole from the ABS is a return line, back into the resevoir. The ABS works by releiving brakeline pressure for the tire(*) that aren't turning and that brake fluid needs a place to go.
I'm going wtih the others, the e-brake is partially down or the fluid level sensor is the problem.