Thanks to all that have posted. The fuse that is in there is the OE spec fuse replaced by Infiniti service today. The detector does indeed work in the back adapter and in all of my other current cars, leading me to believe that all is still well with my Valentine

My experience is only the one time, it worked for a 10 minute drive...turned off car and came back an hour later and no juice. The tech at Infinfiti immedietly new that my detector had blown the fuse, he had seen it many times before.
So far my solution is I bought a longer cord with a coupler that i will try to hide neatly and plug the V1 in there....it's just such a beautiful interior, I hate the idea of jimmy rigged wires in there.....
Thanks again all and feel free to keep the ideas coming.
Best
John