The acc plug is powered by a 10 amp fuse in the distribution fuse box. And that circuit is "keyed" power so its off when the key is. I did use it with my light bars as well however know it's only a 10 amp circuit so you must stay under that. My front light bar takes only 6.4 amps and the rear only 2.6..as I remember.. but they are on a rocker so only one is on at a time. If you remove the hood and storage tray you can get to the line feeding the plug as well as the fuse box on the newer models.