i finally got under there(hell of a place to put the brake equaliztion valve)and took off the electric sensor. now getting the sliding piston back to center is a surigical job equal to laproscopic surgery!!!!! i took the tip off my 12V electric probe light. layin on my back, workin right in front of my face, tryin to figure out if the piston went left or right!!!! took a couple trys....got the light to go out, then bleed the brakes(like the book says, left front, then right front)now i got REAL VOLVO BRAKES.....put ya thru the windshield if you got a heavy foot.