910: audio output picks up noise from lighter power

[horseflesh]

So I get my new 910 all hooked up... and I find that the external speaker output has a really irritating whining noise when the TomTom is plugged in to my lighter.

Any fixes for this? It is so loud that the MP3 player is unusable unless the 910 is running on battery power.

[horseflesh]

Following up to myself: it's a ground loop problem. I did some Googling and this product looks ideal for an easy fix.

http://www.crutchfield.com/S-T52P8hLacqk/cgi-bin/ProdView.asp?g=181150&id=morephotos&pi=1&i=127SNI135&display=L#Tab

I think you can also monkey around with filtering the power before it gets to the components involved, but I don't want to take off my dashboard. And at this point, what's another wire?

[horseflesh]

Update: I got the ground loop filter linked above, and it works perfectly. The MP3 player on my 910 sounds great now.

(Replying to my own post twice in a row... it's a new low!)

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