I WAS BACKING OUT OF MY STEEP DRIVEWAY AND MY FRONT BRAKE SUDDENLY BECAME VERY HARD TO PULL, BORDERING ON IMPOSSIBLE, AND BASICALLY HAD NO STOPPING POWER. AS THIS IS THE ONLY BRAKE I COULD USE WHILE WALKING/BACKING MY BIKE DOWN MY SLOPED THE DRIVEWAY THE BIKE PICKED UP SPEED AND CAUSED ME TO LOSE CONTROL AND THE BIKE FELL OVER. SINCE THEN I HAVE TRIED TO BLEED THE BRAKES 3 TIME WITH NO CHANGE. BRAKE LEVER IS IMPOSSIBLE TO PULL. I THEN REPLACED MY MASTER CYLINDER AND FLUID,BUT COULD STILL NOT BLEED THE FLUID TO GET PROPER LEVER PULL AN BRAKE ACTUATION. I HAVE NOW TROUBLESHOT THIS ISSUE AND NARROWED IT DOWN TO THE ABS MODULATOR, AS I AM GETTING FLUID FROM THE MASTER CYLINDER THROUGH THE LINE TO THE MODULATOR, BUT FLUID IS NOT PASSING THROUGH AND GETTING TO THE CALIPERS. FRONT BRAKES ONLY ARE AFFECTED, AS REAR SEEMS TO BE OK. VERY UNSAFE SITUATION TO HAVE AN ABS SYSTEM THAT DOES NOT HAVE A FAILSAFE BUILT IN TO POSSIBLY BYPASS THE SOLENOIDS IN THE MODULATOR IF THE MODULATOR FAILS. I HAVE READ ON INTERNET FORUMS THAT A LOT OF PEOPLE HAVE HAD THIS SAME ISSUE, SO HOPEFULLY IT CAN BE ADDRESSED.