Question about Lowrance LMS-337CDF GPS Receiver

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My Lowrance LMS-337c df keeps going crazy.

My Lowrance LMS 337c df works for a little bit and then it starts going crazy beeping and flashing and wont turn off.

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  • Anonymous Mar 18, 2009

    Unit keeps powering back on by itself. when it is "on" it blinks constantly. i try to turn it off and it powers back up. it keeps draining my battery when the boat is parked.

  • tomgil Apr 16, 2009

    I have the same problem with my LMS-337CDF. I got it with a second hand boat I purchased in November. It has always powered itself up with the display flashing and audio alarm going off. Is the operating system upgrade worth trying? I don't have a card reader to experiment with.

  • tomgil May 20, 2009

    I tried the soft and hard reset, no joy.  Got a card reader and down loaded software.  System worked until I installed the SD card with maps on it.  Reloaded software and got it to work with Map card installed.  I was doing all this on my work bench with the battery from the boat.  Now that I have the system installed on the boat the problem returned.  I'm going to double check the wire connections and run the negative and shield wires separately as home runs back to the battery.  After that I'm going shopping for a Garmin.

  • nymp11 May 21, 2009

    Yup same problem here exactly. Lowrance want $200 to repair the unit.

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Mine does the same thing when the voltage is low. The GPS part will drain the battery if left connected. Learned the hard way. I installed a battery isolator switch, the one with the big red key, and switch the battery to "Off" when finished. Either that or unplug your unit each time. Still, if the battery is not maintained during storage, the same problem will arise until the battery has been fully charged. Never has done this when the outboard is running and current is going to the battery from the alternator.

Posted on Jan 24, 2010

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Normal 0 false false false MicrosoftInternetExplorer4 st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}This could be caused by glitch in the operating systemsoftware or by low voltage due to a short in the unit or somewhere in the boatswiring. To troubleshoot the problem Iwould recommend the following steps.

  1. Try a soft reset
  2. If the problem resurfaces, try a hard reset
  3. Update the the operating system software

Soft Reset (Does not delete GPSData)
1. Turn unit OFF 2. Press and holdthe PAGES key
3. Press and hold the PWR key
4. Release both buttons when the USA map
Appears

Hard Reset (Deletes stored GPS Data
such as Waypoints and trails)
1. Back up any waypoints, routes,and trails that you want to save on a blank MMC card
2. Turn unit OFF
3. Press and hold the ZIN&ZOUTKeys at
the same time
4. Pressand hold the PWR key
5. Release both buttons when the USAmap
appears

To update the operating system software, check out this link:
Lowrance337c df update


If you don't have a card reader I can program an update card for you.


Posted on Dec 16, 2008

  • Jay Finke
    Jay Finke Mar 25, 2013

    seems there is 3 files in the update witch one should I use ? it says version 1.6.0 the new one is ..LMS-337C DF 12/20/07 1.9.0 7.1MB. .. might be I don't know how to load it on my 1gb sd card ?

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  • Level 1:

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Have the same problem. Have you resoved it?

Posted on Jun 20, 2009

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Posted on Jan 02, 2017

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Gps


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Cheers,
Josh

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