So I know with any wiring system black wire is negative in red is positive but I'm confused with this wiring because the black is mixed in with the red wires I don't know does that matter? It's still negative right? Because I found it connected to the positive side with the red wires. Most of the wires are labeled but this black one's not labeled so I don't know what it goes to. It's taped to the wire that says second cigarette lighter 12v so I'm wondering if it's the first cigarette lighter? And maybe that's why the cigarette lighter doesn't work! Duh! I guess what I really need to know now is if I connect it to the negative side is it going to blow my whole system? Plus I have more questions about problems I'm having with my 21 year old Jeep.