Question about Lowrance LMS 332c Mapping Sonar/GPS Receiver

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Lowrance 332c Sonar

My unit is stuck on the GPS map page which is the screen that defaults when the unit is powered on. I usually like using the Split screen, 1/2 GPS Map and 1/2 Sonar; but when I hit the pages button to switch, it just beeps at me. Please help.


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where could i please software to up date the map on my gps please tell me ok i lost my cd to get it update ok please tell me thank's .. my email is lovermen38 at yahoo

Posted on Jul 21, 2008

  • 26 Answers

SOURCE: need map update

go to Map update


Posted on Feb 12, 2009

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SOURCE: Lowrance 250c map update

tring to get an manual for my system i left it and the glove dept. an a cari sold. thank you lowrance iway 250c .

Posted on Feb 13, 2009

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SOURCE: Cannot access main menu or pages screen

I think I can help with your issue. I have an LMS 334c and have had a few issues in the past. Called the factory (this answer is not listed any where in your manual) and they instructed me to "Soft Re Boot" my unit and it would put everything back to factory settings. Try this anytime it does not respond for whatever reason.

Turn the unit off.

At the same time press the Pages and Power button. Hold both down until you see the square box come up in the screen. You should have your factory settings again. May need to try a few times.
Lowrance said it works just like a computer, ever now and then it just tries to disect to much information at one time and hangs up.
Good luck. James Cantwell

Posted on May 04, 2009

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SOURCE: Lowrance LcX 27C

You need to get a MMC card for it to show Canada.

Posted on Jun 24, 2009

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SOURCE: looking for Map upgrades for Garmin Nuvi GPS

I've looked for free map upgrades for my Garmin and could not find anything. I did find a lifetime map upgrade deal for around $75. It allows you unlimited upgrades for as long as you own the GPS. Go to the garmin site and search NUMaps.

Posted on Jan 18, 2010

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Lms-332c lowrance fishfinder unit turns on as soon as the power wire is plugged in and goes to blinking pinging beeping between hi and low light settings constantly. All other features seem to work fine. A...

I don't know whether you have made a factory reset to this device or not. If not, set it first and see whether it helps you. To make it factory settings:
[1] Press 'MENU""MENU" (down arrow to system setup) "ENT" (down arrow to RESET options/ ENT
[2] The unit asks if you want to reset all the options. Press [<---] to YES and then ENT. All options are reset, and the unit reverts back to map page at 4000 miles zoom range. Any recorded sonar logs of GPS data will be unchanged. OK.

Sep 23, 2011 | Lowrance LMS-332C GPS Receiver

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I have a lcx 110 lowrance graph that wont power up at all. i replaced all the wiring to the unit and tested the plug at the unit all of that is good i also cleaned the connections still nothing. any ideas?

I have found several units that have the same problem. All turned out to be a defective keypad. And almost all are specifically the power button. Not something Lowrance will repair. I've been purchasing some of these units for parts. If you still have it I might be interested.

Aug 23, 2011 | Lowrance LMS 332c Mapping Sonar/GPS...

1 Answer

My Transducer had broke and the sonar went out, then the transducer fell completely off and the unit itself will not power up. I checked the power ot the unit and i have 12 volts going to the unit. It...

All Lowrance systems have an in-line 3 Amp fuze. My guess is that when it broke and fell off the fuze shorted out. Look back the power sypply to the unit and you will find the in-line fuze. Replsacit with a new 3 Amp fuze and you should be up and running.

Aug 30, 2010 | Lowrance LMS-332C GPS Receiver

2 Answers

Units flashes when turned on --won't stop

Here's my LMS 332c circuit board. I'm showing where the power source is on the lower right, and where I believe the first two ribbon cables that lead to the power switch on the front panel (upper left). Can anyone tell me how to disable the internal power switch and where? I want to install external switch and bypass the internal. I can solder and not afraid to try since this unit is out of warranty and is not functional as is with powering on/off and screen flashing randomly. Thanks!

Apr 08, 2010 | Lowrance LMS-332C GPS Receiver

2 Answers

Hello- My 332c will not show speed. It worked before.The spinner wheel is not damaged.Speed just flashes 0.00 mph Thanks, Jeff

Try setting up the speed in the overlay data menu again:
1. Press MENU, arrow down to OVERLAY DATA and press ENT
2. Highlight the option for speed (WATER SPEED or GROUND SPEED) and press ENT
3. Highlight the REMOVE button and press ENT
4. Highlight (PRESS ENT TO ADD) and press ENT
5. Arrow down to SONAR DATA and press ENT
6. Arrow down to WATER SPEED and press ENT, a check will be displayed in the box
7. Press EXIT twice

If the speed is still flashing, the data is still invalid. Try resetting the unit completely:
1. Turn unit off
2. Press and hold the PAGES and POWER key until the "DO NOT RELY..." alarm appears
3. Set up the overlay data for speed again: 1. Press MENU, arrow down to OVERLAY DATA and press ENT; 2. Highlight (PRESS ENT TO ADD) and press ENT; 3. Arrow down to SONAR DATA and press ENT; 4. Arrow down to WATER SPEED and press ENT, a check will be displayed in the box; 5. Press EXIT twice

If the speed is still flashing, good chance the speed sensor is bad even though the wheel still spins. Install the latest LMS-332 updates from and set up the overlay data again.

If it turns out that the speed sensor is bad, just use speed from the GPS. This can be set up from the overlay data menu as GROUND SPEED.

(note: the overlay data must be set up for each page individually. So if you set up speed to be displayed on the map screen, it will not also be set up on the sonar page)

Jul 12, 2009 | Lowrance LMS-332C GPS Receiver

1 Answer

Hi,when i switch on my lms-332c the map does not come up on the screen.If I remove and replace the map card it works perfectly. Can I fix this? regards nigel

I am guessing that the card you are using is a NAVIONICS chart? There have been some Lowrance units that were made around the same time that have had problems recognizing a Navionics chart right from power up.

Make sure the LMS-332 has the latest firmware version which can be downloaded from

If the update doesn't help, this is going to be a compatibility problem with the LMS-332 and that particular card. You will need to replace the card or upgrade to a newer unit...but probably can just get used to removing and replacing the card when you turn the unit on.

Jul 08, 2009 | Lowrance LMS 332c Mapping Sonar/GPS...

1 Answer

I have a lowrance LMS 332C GPS. After 5 years I

The LGC-2000 is bad would be the most likely cause, but if this started right after you changed the cables, Try connecting the NMEA 2000 network to a different power source than the main power. If you still have the original cables, and you didn't have the problem before, try using those again to make sure there isn't anything wrong with any of the new cables.

But most likely, the LGC-2000 is toast and you will want to contact Lowrance support to see about getting it repaired/replaced.

Jul 04, 2009 | Lowrance LMS-332C GPS Receiver

1 Answer

Transducer is mounted on a plastic bracket to trolling motor. when trolling motor is turned on, black vertical lines appear on my screen. lowrance x107 cdf

Are you utilizing another unit in your dash? If so, sometimes when both units are on and in sonar mode, their frequencies will intefere with each other causing the vertical lines. I would suggest turning your dash unit off or lowering it's Hertz rate from 200Hz down to 50Hz.

Funny story...I saw this same issue on my boat years ago. I had an X102C up fron and an LCX-19c in the dash. I acutally thought it was some sort of man-made structure and spent time fishing it...DOH!

Aug 23, 2008 | Lowrance LMS 332c Mapping Sonar/GPS...

1 Answer

I have a lowrance lms332c and the unit powered off , was able to restart.shortly after powered off again and now has nothing.checked fuse and fuse is ok.

try to hold in the page button and power button at the same time to reboot your unit, But you may or may not lose waypoints,

Jul 11, 2008 | Lowrance LMS 332c Mapping Sonar/GPS...

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