Question about Garmin zumo 550 GPS Receiver

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Unit won't draw power from the bike battery

I have fitted the unit, wired it up to the battery on the bike and it worked perfectly. Now it will only work on the internal battery. when I mount it on the bike it won't switch to external power, it just runs on the internal battery. I have to charge it up on the mains and if it's over four hours goes off because the battery has expired. I have cleaned the contacts and checked the fuse and all is ok. Help!??

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  • Anonymous Dec 18, 2007

    Yes I have the same problem. I'm going to try the fix noted here and I'll see if that works. The unit has been working fine on the bike for over a month. Then I washed the bike this past weekend. The unit wasn't on the bike when it was washed but the holder was in it's normal spot but I had the rubber cover over the contacts. Maybe they are corroded. I'll take a look.



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Ay I just fixed my Zumo 550, that would constantly go into battery power when hook up to my Motorcycle, found the enemy I was fighting was lack of proper ground (-).

Posted on Jun 01, 2008


On the lower side of the zumo there are copperm coloured contact points which have to fit to uprising points of the holder on the motorcycle/car. These contact points are very vulnrable to pollution. Clean them dry and use a tiny bit of contact spray.
My first zumo was replaced under warranty because of damage to the contact points due to a leaking battery

Posted on Nov 21, 2007


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