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I have been looking around for information on wiring diagrams on a 18 Jeep JKU Willy’s wiring diagram. My main issue I have is trying to figure out if the jeeps dome/ courtesy light trigger system is negatively or positively triggered when door is open? Has anyone found anything out on this topic?
 

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I added an aux dome light (from a HMMWV) on my '16 JKU, and I believe it's positive triggered. I made a quick diagram/sketch when I did it, but I can't find it (probably tossed it) but I remember it was a 3-wire plug at the dome light. Just checked my build thread, and here's what I wrote "One black-ground, white w/black-power (for the push button operation), and white-dimmer switch (and door switch?)" I don't think it can switch through ground since it has two separate ON functions, but since one has a separate switch, I guess it could be. Just pop the dome light out and put a tester on it. If the ground is always a ground, it doesn't switch through it. JMHO.
 
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