Hello and welcome to JustAnswer!
These things are powered by the IOD circuit. You could have a blown fuse, internal power distribution center problem, or a broken/corroded wire.
It's most likely a blown fuse, and the first thing I'll have to do is send you back to check the fuses again. The IOD is in a black plastic holder that allows it to be popped out but remain in position for quick reinstallation. Since it's in this plastic holder it's often overlooked when checking fuses. To check the IOD fuse you would have to pop the holder up and then use a small screwdriver or pick to open the window on top the holder, then pull the fuse out and check it.
If you've already done this then you have a deeper electrical problem. If you haven't found and checked the IOD fuse then the first thing you'll need to do is go back and check it, because it's very likely blown.