Tailgate Open Switch

Disconnect the negative (-) battery terminal.
Remove the tail gate trim.
(Refer to Body - "TAIL GATE TRIM ")
Remove the tail gate back panel.
(Refer to Body - "TAIL GATE BACK PANEL ")
Disconnect the tail gate open switch and license lamp connectors (A).

Fig 1: Disconnecting Tail Gate Open Switch And License Lamp Connectors
Courtesy of KIA MOTORS AMERICA, INC.
Remove the tail gate open switch and license plate lamp (A) by loosening the bolts inside the tail gate.

Fig 2: Removing Tail Gate Open Switch And License Plate Lamp
Courtesy of KIA MOTORS AMERICA, INC.
Remove the tail gate open switch assembly (A) after loosening the screws.
Remove the license lamp bulb (B) and then disconnect the wiring (C).

Fig 3: Removing Tail Gate Open Switch Assembly

Courtesy of KIA MOTORS AMERICA, INC.

Fig 4: Locating License Lamp Bulb And Wiring

Courtesy of KIA MOTORS AMERICA, INC.