Final answer:
If your engine quits while driving, you could lose power steering, power brakes, and the electrical system functions, making it more difficult to control the vehicle and affecting the visibility and safety features.
Step-by-step explanation:
If your engine quits while you're driving, you could lose several important functionalities related to car operation. The most significant losses include power steering, power brakes, and electrical system functions. Without the engine running, the power assist that makes steering easier will fail, making it much harder to turn the steering wheel, especially at lower speeds. Similarly, power-assisted brakes require engine vacuum to operate effectively; without the engine, stopping the vehicle will require much more physical force on the brake pedal. Additionally, your vehicle's electrical system, which powers the headlights, taillights, and interior lights, also relies on the engine. Failure of the engine can result in the reduction of the electrical charging system, causing lights to dim, similar to how a refrigerator light dims when the motor comes on due to increased electrical load, or lights dimming in a car upon engine start due to battery resistance.