How to fix power steering assist fault in a ford mustang?

On hydraulic power steering systems, a common reason for the warning light to illuminate is low power steering fluid. You should pull over if You see this light turn on and check the fluid level immediately. Top it off with the correct fluid type and the light should turn off on Your Ford Mustang. In motor vehicles, a power steering system helps drivers steer the vehicle by augmenting steering effort needed to turn the steering wheel, making it easier for the vehicle to turn or maneuver.As its name suggests, hydraulic power steering uses the force of pressurized hydraulic fluid to assist with the steering, working whenever the driver turns the steering wheel. The fluid is pressurized by a pump, which gets its power via a belt attached to the engine.