Thanks for your help guys. The latest: It appears there is power at the license plate lights, but the bulbs won't light and are not blown. (I tried replacing with new bulbs.) The test light lights-up if I attach the clip to the inside of the trunk frame and probe the connection where the bulb attaches. Does this mean that I have a bad ground? Can I just rig a ground wire and make my own rather than trace the bad one? Is there a place to look where that bad ground might be?