The ignition switch must be in the ON position for fan operation.
The fan speed control knob allows you to control the fan speed of the air flowing from the ventilation system.
To change the fan speed, turn the knob to the right for higher speed or to the left for lower speed.
Hyundai Tucson (LM) 2010-2015 Service Manual: Rear Glass Defogger Switch Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the right air vent.
(Refer to BD group - "Crash pad")
3.
Remove the rear glass defogger switch (A).
[LHD]
[RHD]
Take care not to damage the hook when removing the rear glass defogger switch.
I ...
Hyundai Tucson (LM) 2010-2015 Service Manual: ESC OFF Switch Repair procedures
Inspection
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the crash pad side switch assembly.
(Refer to Body - "Crash Pad")
3.
Check the continuity between the switch terminals as the ESC OFF switch is engaged. ...