Trunk Switch

WARNING: This page is about a different car, the 2016 Hyundai Sonata and 2015 Hyundai Sonata. However, it is still accessible from the selected car via links, so may be relevant.

Check for continuity between the tailgate latch terminals.

Fig 1: Checking Tailgate Latch Terminals Continuity
Courtesy of HYUNDAI MOTOR AMERICA
If continuity is not specified, inspect the switch

Fig 2: Switch Connector Terminal Continuity Chart
Courtesy of HYUNDAI MOTOR AMERICA