Question about Garmin StreetPilot c340 GPS Receiver

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Garmin C340 battery not charging

I've been using this GPS for about 2 years now and I recently noticed there is no longer a battery icon or power when it is unplugged from the power source in the car. I tried the reset button and that did not work. I also left the GPS plugged into my computer for a whole night and still no battery icon or battery power. Is the battery replaceable? Do I need to change the fuse? I am concerned that if I lose power in the car I'll be stuck. Any suggestions?

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  • Anonymous May 11, 2008

    checked power coming in. put new fuze in. battery will not charge

  • JONGRIF May 22, 2008

    i JUST GOT THE GARMIN FROM MY SISTER. SHE HAD IT IN HER CAR AND THE SUCTION CUP STOPPED WORKING ON HER WINDSHIELD. SHE BOUGHT A NEW FLAT SCREEN GARMIN AND GAVE THIS ONE TO ME. I JUST TIRED PUTTING IT IN MY CAR...IT BRIEFLY TURNED ON, BUT THEN IT IS JUST DEAD. I ONLY HAVE THE AUTO CORD FOR IT. IS THE BATTERY DEAD?

  • blackzx1200 Jul 05, 2008

    My c340 is not charging anymore. I changed out the vehichle power cord for a new one and still no battery power. The unit is dead. What do i need to do?

  • u2xtra1 Jul 14, 2008

    it dont want to turn on are charge

  • doug18 Aug 10, 2008

    Battery has seemed to died after about 13 months of use. I plugged the charger into my car's cigarette lighter area and pushed the reset button. At first, the unit worked about a minute or two before dying again. Now the unit doesn't work at all. I am now at a loss as to what to do. I really like the C340, especially when I compare it to the Tomtom One, which someone gave to me as an award for my production at work. Please help. My email address is doug18@optonline.net.

  • Anonymous Aug 12, 2008

    MY GARMIN DIED WHILE IN USE OUT OF STATE,LOW BATTERY MESSAGE CAME ON THEN IT WENT OUT AND WOULD NOT COME BACK ON PLUGGED INTO 12VOLT STILL WOULD NOT CHARGE,THESE

    GPS COST TOO MUCH FOR SOMETHING LIKE THIS TO GO OUT

  • Anonymous Aug 21, 2008

    Battery will not charge and will only work on 12 volt power.

  • Anonymous Mar 30, 2014

    gps will not charge even when plugged into external power

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The Garmin batteries tend to die after about 2 years. Garmin will replace the battery for you but prepare to pay top dollar. It is a shame because the problem is commonplace. They should have made the replacement user friendly. The battery is buried deep inside and it is soldered.

Posted on Jul 13, 2008

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It is possible the battery has died. This is not designed to be replaced by the consumer. Your best bet would be to contact Garmin regarding replacing the battery.

Posted on May 21, 2008

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SOURCE: Saving Favorites before updating Garmin c340

Use MapSource to transfer the Waypoints from the unit to your PC. If you lose them, you can then transfer them back. (I updated a C330 from 4.40 to 6.10 and did NOT lose them, however.)

Posted on Jul 28, 2008

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1 Answer

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Common issue. Steps to troubleshoot/solve:
1. Pull off face, press reset tab.
2. If unit wont turn on or if turns off immediately, connect to home computer using mini usb on side of gps (any usb cord that fits will do). This will charge the internal gps battery, which is discharged.
3. You will not be able to see the gps charge indicator while the usb cord is plugged into the unit. To check charge level, disconnect it, turn it on, and note the large "battery" icon.
4 Do you have a dead internal battery? If the gps holds a charge from your computer usb port, you don't.
5. If you have a dead battery, Google DIY replacement. With some soldering it can done for $15 total.
6. If you don't have a dead battery, the issue is charging from the cigarette lighter socket. Your car socket may have blown a fuse (check car manual). Your charger unit may have blown a fuse (unscrew the tip, check fuse inside). Also, some car sockets don't work when the ignition is off. Test yours.
7. There is a good chance the connection of the charger wire to the gps cradle is the problem. Fiddle with that. Replacement cradles are available for the c340 at about $25.
8. If your unit is not charging from the cradle/socket, buy a 12v usb cord. Plug into socket and into usb port of the gps. This is a workaround or alternative to buying a new cradle.
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