California Class B Driving Permit Practice Test 2026 - Free Class B License Practice Questions and Study Guide

When hydraulic brakes fail, re-pressurizing the system by pumping the brake pedal is the best first move. The braking system relies on fluid pressure; if that pressure is lost, the pedal can go to the floor and braking power drops. Repeatedly pumping the pedal helps build pressure again in the lines and can restore enough braking to slow or stop the vehicle.

If pumping doesn’t bring back adequate braking, you should still stay in control: steer to a safe area and gradually use the parking brake to help slow you down, and downshift to use engine braking. Avoid turning off the engine while moving, since that removes power steering and brake assist and makes steering harder. Do not coast in neutral; keep in a gear so you can use engine braking and maintain control until you stop.