Tailgate Open Switch

Disconnect the negative (-) battery terminal.
Remove the tailgate trim.
(Refer to Body - "TAIL GATE TRIM ")
Disconnect the tailgate open switch connector (A).

Fig 1: Tailgate Open Switch Connector
Courtesy of KIA MOTORS AMERICA, INC.
Remove the tailgate switch (A).

Fig 2: Tailgate Switch

Courtesy of KIA MOTORS AMERICA, INC.