Adjusting instrument cluster illumination

When the vehicle's parking lights or headlights are on, press the illumination control button to adjust the brightness of the instrument panel illumination.
When pressing the illumination control button, the interior switch illumination intensity is also adjusted.
WARNING
Never adjust the instrument cluster while driving. Doing so could lead to driver distraction which may cause an accident and lead to vehicle damage, serious injury, or death.

Instrument Cluster
GaugesHyundai Elantra AD (2016-2020) Service Manual: AUX jack Repair procedures
Removal
1.
Disconnect the battery (-) terminals.
2.
Remove the floor console assembly.
(Refer to Body - "Floor Console Assembly")
3.
Remove the multimedia jack (A) from the console under cover after releasing the fixed hooks (B).
Installation
1.
Connect the multimedia jack connecto ...
Hyundai Elantra AD (2016-2020) Service Manual: Power Window Switch Schematic Diagrams
Circuit Diagram
Driver Power Window Switch
[Driver Power Window Switch (Safety)]
[Driver Power Window Switch (Auto Down)]
Assist Power Window Switch
Rear Power Window Switch
[Rear Power Window Switch (Manual)]
[Rear Power Window Switch (Manual + Seat Heater)]
...