The electric rear window defogger system is being discussed. Technician A says the grid is a series of controlled voltage amplifiers. Technician B says to protect the vehicle's electrical system, a timer circuit may be incorporated. Who is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because a timer circuit is often used in electric rear window defogger systems to protect the vehicle's electrical system by limiting the operation time of the defogger, preventing battery drain and excessive current draw. Technician A is incorrect because the grid is not made up of voltage amplifiers; it is a series of resistive wires that heat up when current passes through them to defog the window.

The Electric Rear Window Defogger System Is Being Discussed