thanks Paul - I've re-seated the power plug at the back of the unit several times - my post was more asking where the power is likely to be terminated, as I can't easily determine that. The installation manual says it's ideal to run power direct to the battery, but I can't see that has happened in this case. The power plug also has NMEA Data & power circuits as part of it. Just don't want to go disturbing things if someone can point me to the likely power source.
![Wink :wink:](./images/smilies/icon_wink.gif)
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2006 Sundowner 255
Volvo Penta 5.7L GXi 320HP DuoProp
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