Nissan Altima (L33) 2013-2018 Owners Manual: Rear window and outside mirror (if so equipped) defroster switch
Type A
To defrost the rear window glass and outside
mirrors (if so equipped), start the engine and
push the rear window defroster switch on. The
rear window defroster indicator light on the
switch comes on. Push the switch again to turn
the defroster off.
The rear window defroster automatically turns off
after approximately 15 minutes.
CAUTION
When cleaning the inner side of the rear
window, be careful not to scratch or damage
the rear window defroster.
Type B
NOTE:
The top and bottom few rows of wires on
the rear window are not part of the rear
window defroster system. These wires
make up the antenna for the audio system.
WARNING
In freezing temperatures the washer solution
may freeze on the window and obscure
your vision which may lead to an
accident. Warm the window with the defroster
before you wash the window. ...