The _______ protects the windshield wiper electrical system

The _______ protects the windshield wiper electrical system

• A. Relay
• B. Diode
• C. Resistor
• D. Fuse/circuit breaker

Answer: (D)

Fuses and circuit breakers protect electrical circuits by interrupting current when it exceeds the rated limit. In the windshield wiper circuit, a fuse or circuit breaker is placed in the power supply line to the wiper motor. If the motor draws too much current due to a stall or a short, the protection device opens, preventing damage to wiring and components. Other parts have different roles: a relay switches the motor on and off under control of the wiper stalk; a diode can be used to suppress voltage spikes from the motor, and a resistor might be used in some speed-control schemes. But the primary role of protecting the entire circuit from overload is fulfilled by the fuse or circuit breaker.

Fuses and circuit breakers protect electrical circuits by interrupting current when it exceeds the rated limit. In the windshield wiper circuit, a fuse or circuit breaker is placed in the power supply line to the wiper motor. If the motor draws too much current due to a stall or a short, the protection device opens, preventing damage to wiring and components.

Other parts have different roles: a relay switches the motor on and off under control of the wiper stalk; a diode can be used to suppress voltage spikes from the motor, and a resistor might be used in some speed-control schemes. But the primary role of protecting the entire circuit from overload is fulfilled by the fuse or circuit breaker.