1. Check for continuity between the No. 8 terminal of the tailgate closer unit 12P connector and body ground.

Is there continuity?

YES | - | Repair a short in the GRN/BLK (LACT) wire between the No. 19 terminal of power tailgate control unit connector A (26P) and the No. 8 terminal of the tailgate closer unit 12P connector.■
NO | - | A short circuit for LACT line in the tailgate closer unit; replace it.■