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Globalmap 2000 sonar not responding

I have a Lowrance Globalmap 2000 and a Lowrance Bluewater in-dash depth sounder - all hooked to a SAM-ST. The bluewater seems rather eratic and I have a message on the Globalmap sonar screen that says "Sonar not responding". Any ideas on how to fix this?

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  • Kdkiehn Aug 26, 2008

    Ok, did some more wire tracing and searching and I was wrong - each unit has it's own through-hull transducer. The Bluewater will not read correctly, whether the Globalmap is on at the same time or not. Same is true for the Globalmap and getting the "sonar not responding message." All the connections up front (at the flasher, Globalmap, and SAM-ST) are clean and tight. I can't believe that both transducers would cease to function at the same time. Do the transducers themselves have a ground that could have come loose? I don't want to have to remove the batteries and charge to get in to inspect them unless I absolutely have to - especially in the middle of fishing weather!

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Not enough info to diagnose your problem. It sounds like a networking problem. I couldn't find a manual for the sam-st module so I'm not sure how you have it hooked up. Typically with these devices only one would be hooked up to the SONAR module, and it would then share the data with the other display via an ethernet or NMEA2000 network. The erratic behavior of your bluewater could be due to some sort conflict with the current coming from the GlobalMap2000. Do you get the same problem when the 2000 is turned off? Have you tried running the GlobalMap2000 with the bluewater turned off?

Posted on Aug 19, 2008

  • Paul Hyde
    Paul Hyde Sep 01, 2008

    All transducer connections are sealed and a cable failure would mean replacing the entire transducer and cable. The only thing I can think of that would cause a simultaneous failure would be possibly a screw from some other installation that happened to pierce both cables at the same time.



    Is the SAM-ST getting power? It should have an LED indicator that lights up when turned on. If it is on make a note of what color it is and how it is flashing. Usually green indicates a working model, and some other color represents some kind of internal failure.

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