I have a 2010 1/2 ton 4X4 Crew with the towing package. I bought a trailer brake controller. When trying to install the controller, I found the pre-installed chevy wiring under the dash exactly as the installation instructions said that I would. The only problem is that the 12V power wire on the truck has no voltage on it. I assumed that there was a fuse missing so I tracked down the trailer brake fuse and was shocked to find a fuse installed. Is there another fuse location that I am overlooking? I could rig it up to have 12V but would like to use the factory wire if possible.