Cigarette lighter power

[ltfire344]

Just recently tried to tap into my cigarette lighter to hook up CB radio. When i did it blew the fuse in the truck. I assumed the black wire going into the center of the lighter was positive and the gray wire on the side was negative. Did i wire them backwards? Which one is positive, and which one is negative? Thanks

[TAG]

i just wired up some lights that light up the floor boards and the hot is gana be the gray on the side

[Zytek_Fan]

The positive on my cigarette lighter was blue with a red stripe.

[wsigo]

The center of the cigarette lighter is 12V+. The case of the plug is 12V-. If you're unsure, use a multimeter- if it reads out a number with a "-" sign in front of it, you're hooked up backwards. Don't want to see you fry your radio!! My guess is your radio drew too much power for the fuse, or maybe there was a loose connection somewhere causing a short. You'd probably be better off pulling power from one of the customer accessible 12V+ wires under the dash. They come in from the under hood fuse block, and are terminated somewhere behind the dash, near where your right shin would be. At least, that's where they were on my truck. Good luck bud