i have been a mechanic for 14 yrs have worked on many cars just cant figure this one out i have a 90 sc just bought a month ago had it park in driveway came out and a puddle of brake fluid under car mastercylinder was empty i filled it back up now the brake light and abs light is on the abs computer is gone not installed brake pedal is very hard was working normal before puddle of fluid was found any ideas?