Here is a diagram of what I used each of the brass contacts on the Jamb Tac for. This will work as long as one door is closed. Once both are open, the lights will go out. Sure, I added a couple of relays to pull it off (not shown), but now there is nothing for the Jeep owner to do in order to pull the doors. You notice I don’t use one of the terminals but ground through the door. Some newer Jeeps have plastic sleeves in the door pins and grounding to the door won’t work. In that case, just connect the top pin with the unused one, and ground it inside the Jeep.