Brake warning light - Proportion valve wire connection ?

if it keeps coming on even after you switch the wire like TERRY SAID.....you may have to bleed The brakes....or open the front Bleeder and slam the pedal to the floor to throw the valve to the opposite dirrection.....and then drive, if light still on try opening the rear and slamming the pedal down a few times....the valve may be so close to one side or the other that may be tripping light saying your brakes are failing.........Make sense.....an doubt remove the bulb LOL