Hyundai Sonata: Seat Electrical / Seat Heater Switch Repair procedures

Removal
[Front Seat]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the heater and A/C control unit.
(Refer to Heating, Ventilation and Air Conditioning - "Controller")

[Rear Seat]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the rear door window switch.
(Refer to Power Windows - "Power Window Switch")
Seat Heater Switch Schematic Diagrams
Circuit Diagram ...

Air Ventilation Seat Components and Components Location
Component Location ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: To increase Smart Cruise Control set speed
Follow either of these procedures: Push the toggle switch up (RES+), and hold it. Your vehicle set speed will increase by 5 mph (10 km/h). Release the toggle switch at the speed you want. Push the toggle switch up (RES+), and release it immediately. The cruising speed will increase by 1.0 mp ...

Hyundai Sonata LF 2014-2019 Service Manual: Components and Components Location
Component Location 1. Auto light sensor2. Head lamps3. Lighting switch (Auto)4. Tail lamps5. BCM (Body Control Module) ...

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