I want to run a small air compressor off my 2011 ecoboost. Just 120v, 120psi, 1 gallon air tank. I have a 110v plug in my back seat that would be good enough I'm sure, but I want it outside the truck. Am I better off to just buy an inverter or tie into that plug in? Someone tried telling me there's a 110v plug under the carpet in the back by the tire jack but Ive never heard that before. It's for a new horn I purchased.