Dash brake light stays on

The e-brake switch is in parallel with the brake system warning switch. Go under the hood and:
- Check your brake fluid
- Disconnect the single black wire to the switch on the MC or the proportioning valve (that tells you that half of the brake system has failed), and see if the light goes off. This brake light is also the Brake Warning light, used to tell you that the brake system has an issue.
- If this turns the light out, then have the brake system checked if you are not mechanical. If you are, and you think the brake system is alright, then go through the procedure to move the brake warning switch's piston to the center (off) position. This usually involves opening a bleed screw and pushing a bit of fluid out of one half of the system or another to get the switch's piston to move to the center position (warning light off).

Beware: your brake system MC may have partially failed internally and is allowing pressure from the fronts to bleed to the rear or vice versa, and that is causing this brake warning switch to activate so you may indeed have a brake system problem; that is what it is there for! If you drive with this problem and you then have an external brake system leak, you will have NO brakes.