First, let me say, I don't have XM or Sirius. However, I have read all the various threads on running the antenna and I am wondering...
As a variant of running the wire through the seal of the third brake light has anyone considered running the wire THROUGH the brake light cover? It seems to me that a "just big enough" hole in the middle of the top of the red clear plastic and another one through the back of the brake light assembly, near the top, might be ONE way to go. Of course, you could still seal and all. If you can visualize this the wire would almost "elbow" through the cover. Would that be any more watertight?
Or is it just a bad idea because if it leaks it takes out your brake light?
TJR