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Question about Lowrance LMS-337CDF GPS Receiver

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Gps not working

When ever i turn unit on it says "gps module not responding" try to reset unit but didnot do anything.also checked all connections . when map pops up it has the last location i was at before it stop working,diretion arrow has a "?" on it.

Posted by jeff carey on

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  • dcarroll1038 Jun 03, 2008

    says gps module not responding and has a ? mark where the cursor is sometimes it would pick up waas then out again. It would keep going in and out and this spring has not been working at all

  • robertdiaz Jan 17, 2009

    gps module not responding on my unit. it is a lms 337c df

  • shanemixon Jan 23, 2009

    MY GPS IS SAYING THE SAME THING GPS MODULE NOT RESPONDING

  • Anonymous Jan 31, 2009

    Same problem here. My Gps worked fine for the past 2 years and just last week says 'gps module not responding'. Sounds like a pretty wierd coincidence that more than 1 of our 337C units have quit in the last week or so.

  • Anonymous Feb 01, 2009

    I took my boat out today and had the same problem. The unit is 2 1/2 years old and it's stored inside the house when it's not in use. Seems odd to have so many go at the same time.

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3 Answers

Anonymous

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I know this may sound funny but replace the water temperature sensor cable that's connected to the unit. There is a module in the temperature sensor cable that has been going bad on a lot of these units recently. I had the same problem and replaced the temperature sensor cable and that fixed the problem.

Posted on Feb 26, 2010

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Anonymous

Sorry, that's a stupid response. Common ground means common point ground. There's no reason to spread out your grounds, unless you are pushing so much current though ground that you are frying the wires.

You probably have a faulty system that needs repair.

Posted on Mar 17, 2008

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Anonymous

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What you need to do is Make sure that your negative wires are located on different negative wires within the boat. You cannot take all the negative wires and hook them up to the same location. Also make sure that the 60Ohm terminator is properly connected. Hope this helps. Letsgofishin.us

Posted on Aug 03, 2007

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I wonder if the module has failed again, have you tried reseting the device?

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Hello :

I recommend you to reset your device .

Try this for soft reset :

1. Turn unit OFF
2. Press and hold the PAGES key
3. Press and hold the PWR key
4. Release both buttons when the USA map appears
..................................................................................

If soft resetting didn't work , then I would recommend you with hard resetting . Here is how to hard reset your device . But Hard Reset (Deletes stored GPS Data such as Waypoints and trails) .

1. Turn unit OFF
2. Press and hold the ZIN&ZOUT Keys at the same time
3. Press and hold the PWR key
4. Release both buttons when the USA map appears

PLEASE DON'T FORGET TO RATE !
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HAVING A PROBLEM WITH MY LOWRANCE 525C WITH EXTERNAL ANTENNA. IT KEEPS TELLING ME GPS MODULE NOT RESPONDING. I HAVE CHECKED ALL CONECTIONS AND CANNOT FIND A PROBLEM. WHAT NEXT

Make sure that you have powered the NMEA 2000 network. The display unit's power cable has a set of red, black, and sheild wires that need to be hooked up to a 12VDC power source. There is a power diagram somewhere in the manual that should show this.

Make sure that you have the NMEA 2000 network connected properly. If it is a newer version LMS-525, it should just be a single 15ft cable that has two female ends, the module plugs into one end, and the other end plugs into the back of the display.
If it came with some T connecters and 120Ohm Terminator caps, then make sure you have that hooked up correctly. There should be a diagram in the manual for that as well but you just connect the two T's together like TT, put the 120Ohm terminators at each end, and run the extensions to the display and GPS module.

There is a decent troubleshooting guide for checking to make sure power is getting to the module at http://primus.lowrance.com/support/resultDisplay.do?gotoLink=92&docType=1000&contextId=426%3A92.273%2C600.639%2C92.113&clusterName=ClusterPublic&lang=english&docset=%2FDocuments%2FTroubleShooting%2FNew+Utility&contentId=42296cce-4f9b-40c8-9dcf-33d5df754009&responseId=135ccbe2cfd4f608%3A1fe88d%3A1225c5cc17c%3A-bac&groupId=4&answerGroup=1&score=986&page=http%3A%2F%2Fprimus.lowrance.com%2Ficr%2FTroubleShooting%2FNew+Utility%2FNU_GPS_ModNR.htm&result=0&excerpt=Module+Not+Responding+The+GPS+module+not+responding+(early+GPS+products+may+also+indicate+coupler+not+responding)+indicates+that+the+unit+and+module+are+no+longer+communicating.&question=gps+module+not+responding&resultType=5000#Goto92

If this doesn't tell you anything, most likely the GPS module is bad.You will need to contact Lowrance support to get it repaired/replaced. You can call them at 800-324-1356 or email them at http://www.lowrance.com/en/Support/Product-Support/Contact/
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"GPS Module Not Responding" is the display units way of telling you there is basically no GPS module connected. You didn't say which unit you have, so I am assuming this is something like an LMS-520? The GPS module is the LGC-3000? If this is the module you have, make sure that you have powered the NMEA 2000 network. The display unit's power cable has a set of red, black, and sheild wires that need to be hooked up to a 12VDC power source. There is a power diagram somewhere in the manual that should show this.

Make sure that you have the NMEA 2000 network connected properly. If it is a newer version, it should just be a single 15ft cable that has two female ends, the module plugs into one end, and the other end plugs into the back of the display. If it came with some T connecters and 120Ohm Terminator caps, then make sure you have that hooked up correctly. There should be a diagram in the manual for that as well but you just connect the two T's together like TT, put the 120Ohm terminators at each end, and run the extensions to the display and GPS module.

There is a decent troubleshootin guide for checking to make sure power is getting to the module at http://primus.lowrance.com/support/resultDisplay.do?gotoLink=92&docType=1000&contextId=426%3A92.273%2C600.639%2C92.113&clusterName=ClusterPublic&lang=english&docset=%2FDocuments%2FTroubleShooting%2FNew+Utility&contentId=42296cce-4f9b-40c8-9dcf-33d5df754009&responseId=135ccbe2cfd4f608%3A1fe88d%3A1225c5cc17c%3A-bac&groupId=4&answerGroup=1&score=986&page=http%3A%2F%2Fprimus.lowrance.com%2Ficr%2FTroubleShooting%2FNew+Utility%2FNU_GPS_ModNR.htm&result=0&excerpt=Module+Not+Responding+The+GPS+module+not+responding+(early+GPS+products+may+also+indicate+coupler+not+responding)+indicates+that+the+unit+and+module+are+no+longer+communicating.&question=gps+module+not+responding&resultType=5000#Goto92

If this doesn't tell you anything, most likely the GPS module is bad.
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can not be fixed from home. i'll have to send it back to lowrance. tried soft reset and hard reset, gps module not responding icon still pops up on screen, thank you for the suggestions.
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Was working fine,then i get mess.gps module not responding ???

hi,your gps module-antenna is powered into 12 volt same as unit,have you traced your cable-fuses etc
john
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