This may take some time as I will have to strip the console to get at the wire at the switch. I had it in and out three times in the last week and it is a pain to do.
A break in that wire is a definite possibility as I cut that wire when I installed my 1st Double DIN head unit so it could be extended to the arm rest area. Subsequently I went to a different design and the switch module went back to the area that once had the ash tray. I cannot say when that switch failed to work as it is not used very much at all. The wire joint is soldered and shrink wrapped, did I make a bad joint? I am not a first timer at soldering so I doubt it. I have not seen any signs of rodents.
The easiest way is to find the wire on the other side of the switch and test it with a light and check the continuity between the WT/DG at the BCM through the switch to the line entering the switch, operating the switch should vary the brightness of the bulb. That wire is hard to find for me and maybe it is not safe to do as it is a ground wire.
Thanks for the time and effort you have spent, I appreciate it.
I guess I am going to have to bite the bullet and pull the radio again.