i ended up having to change the stop light switch but now only the drivers side brake light lights up when i push on the brake pedal. im halfway there.what could be the cause of this. i also have a problem with a header gasket its puffing some air but there is a set of locking hex screws and i cant get any allen wrench i have in one of the screws because of where the bend is on the header does anyone know of some kind different tool i could use so i can change this gasket.