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 Service Manual: Auto Head Lamp Leveling Unit Troubleshooting
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Hyundai Sonata LF 2014-2019 Service Manual: Seat Belt Pretensioner (BPT) Description and Operation
Description The Seat Belt Pretensioners (BPT) are installed inside Center Pillar (LH & RH). When a vehicle crashes with a certain degree of frontal impact, the pretensioner seat belt helps to reduce the severity of injury to the front seat occupants by retracting the seat belt webbing ...

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