Why would the rear brakes on a 95 Honda Accord stop working?

The car stops fine using just the front brakes, however the rear brakes are covered with rust. It was just at the Honda Dealership a couple months ago to replace the anti lock brake system sensors on two of the wheels and atleast one of them was a rear wheel. Would this be a caliper, brake line, master cylinder issue or just complete coincidence?Why would the rear brakes on a 95 Honda Accord stop working?There could be one of many things going on with your brakes. More than likely it could be the porportioning valve is working incorrectly, master cylinder has failed, or a break in lines. If there is no fluid leaking, then the likely cause would be the master cylinder. Also check your fluid level in your master cylinder's rear brake resevoir.Why would the rear brakes on a 95 Honda Accord stop working?Some cars have a pressure control valve that will send the fluid to only the rear or front is there is a leak for safety. However sometimes they can get stuck and only send fluid to one set of brakes even if their isn't a leak. There could also be a clog in one of the brake lines. Could be a problem with the master cylinder. Does the parking brake work the back calipers?