On Thu, 20 Aug 2009 09:39:44 -0800, Bruce in alaska
wrote:

When you hit the Tune Button, on the radio, do you hear the Autotuner
relays clicking as the tuner does it's thing? If Yes, then suspect the
RF Ground. If No, then open the tuner, and see if it is still powered by
the radio +12 Vdc bus.

Sounds like a plan. No, I have not heard the tuner relays recently
which is one of the things that makes me suspect a tuner problem. Is
there a test point for +12 readily available inside the tuner box?

If the +12 is there (or not), what next?