Rear Window Defogger Timer: Inspection

While operating the components/check whether the operations are normal as shown in the timing chart. (Including outside mirror heater)

1. Once ALT "LH is ON, if the defogger is switched ON, the defogger will stay ON for 20 minutes duration.
2. If defogger switch is pressed again (see Step  1), or if ignition is switched OFF, the defogger will shut OFF.
   Fig 1: Identifying Signal Waveform

   Courtesy of KIA MOTORS AMERICA, INC.