i just read your post and realized you posted the install instructions for the tail gate opening.
Do you realize that this is going to give a thief access to the vehicle?
What this does is just using the unlock to disarm the factory security circumventing the need for the actual key. by holding it down it will simulate what you would do when you insert a key into the tailgate cylinder.
So if the switch is placed within view like i have seen some guys do because they dont want to fish it thru the hatch boot. a thief can break the window and press unlock and disarm the factory security. Dont forget, there is no impact sensor on factory security systems. The difference here vs lets say they broke the drivers window and hit unlock on the drivers door. the system will not go off until the door is opened, there is a door pin switch. hitting the unlock switch will not disarm the truck. using the rear "mod switch" will since it is directly going to the rear key cylinder microswitch that is meant for factory arm and disarm.
I'm not trying to start any war or anything, just was not sure if you knew of this security vulnerability now with this modification.