I unscrewed and reseated antenna on van body. It seems to have reduced
the whine a lot, but this problem has me very shy to say I have licked
it :)

alistair

On 12-Apr-11, at 5:07 PM, Alistair Bell wrote:

> I posted earlier this afternoon that I had solved the radio whine
> problem. I though I had. I had tested it with engine off and on BUT I
> did not have the antenna connected. When I re-installed the unit the
> whine was back when engine running.
>
> To say I was chagrined is an understatement. Back to it, checking
> ground sources when I noticed that the unit would remain on even with
> headunit ground removed, and even with head unit out of mount. It was
> grounding through the antenna.
>
> Antenna disconnected and main ground wire reconnected, no whine when
> engine running.
>
>
> So now I have determine if that kind of grounding through antenna is
> normal, or a fault.
>
>
> alistair