Rear Defroster Switch

[John Cassidy]

<<It takes a decent amount of amperage- amperage necessary to "as
quickly as possible" recharge your battery after starting. >>

This is a plugger's way to tell when your alternator belt needs
attention.  Lights on, heater on, stereo on, (seat heaters would be on
if they worked).  Hit the rear defrost button and the alternator belt
starts screetching like a dog $hitting ice cubes:  Service alternator
belt.

JC