OK, I admit I was squeamish about drilling several holes in the roof. So I had the dealer install mine. I should have known that sooner or later I was going to have to figure out the wiring - probably the hard way. I was right.
About a year ago I noticed a wire dangling loose. The light bar still worked so I didn't really worry. Then I noticed the dashboard indicator didn't work when the light bar was on. AHA! That dangling wire must have something to do with it (correct).
So lately I've been tearing apart the dashboard looking for two buzzes (different subject) and decided to fix the dangling wire.
I noticed that there was a tag on it that said "B+." Being an engineer (but not an electrical engineer) I concluded that this wire needed to be connected to positive battery (incorrect). Being a safe engineer I decided to hook it to a fused battery plus circuit (didn't help).
Let's just say that I let the magic smoke out of the wire (remember I'm not an electrical guy - I still believe in the smoke pressure theory
http://www.peizhang.com/forfun/forfun_writings_smoke.htm).
No permanent damage (except to some wire that still has no function) the light bar still works.
So I started calling around at work and managed to finally get the installation instructions for the light bar. Gee, that wire goes straight to an LED that I can't ever remember working, and after removing that part of the instrument panel, gee there's an LED with two broken wires on it. Mystery solved.
Moral of the story - If you don't absolutely know what is does - don't f%$ with it...
P.S. if anyone wants to see the MOPAR pictogram directions of how it's done PM me with your email.