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Thread: Terrova all hooked up....but Interference in my fish finder

  1. #1
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    Default Terrova all hooked up....but Interference in my fish finder


    The only problem I have now is the humminbird 597 DI on back of boat have a bad picture. Not clear unless I stop the terrova. What is it I need to do. Right now I have the FF powered to an accessory switch on the panel. I'm not sure what battery it's going to yet.

    I have two trolling batt and one start battery. Any help would be great.
    So far I'm loving the terrova
    "Choices you make dictates the life you live"

  2. #2
    Cane Pole's Avatar
    Cane Pole is offline Crappie.com 2011 Man of the Year * Crappie.com Supporter
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    I would install one of those choke cables from humminbird and wire direct to the start battery (via fuse of course). Best shot.
    Member BS Pro-Staff and Billbob Pro-Staff
    Proud Member of Team Geezer... authorized by: billbob and "G"

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    I would wire direct and be sure wires are not touching trolling motor wires.

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    Also try with trolling motor down without other fishfinder on. Could be interference from other transducer.

  5. #5
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    Thanks I'll have time to play with it tomorrow. I'll update
    "Choices you make dictates the life you live"

  6. #6
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    Quote Originally Posted by crappielimits View Post
    Also try with trolling motor down without other fishfinder on. Could be interference from other transducer.
    I did cut trolling motor off and coast, then it cleared up. I don't have a fish finder hooked up yet on the TM
    "Choices you make dictates the life you live"

  7. #7
    papasage's Avatar
    papasage is offline Crappie.com 2011 Man of the Year & Moderator GA * Crappie.com Supporter
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    i had one that i had to hook to cranking battery .TM would interfear with HB . didn`t alwayes just started one day .
    retired and now i will always fish

  8. #8
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    best of luck, it can be trickey to fix, that terrova/humminbird combo, take your time and don't forget to look for the easy fix, it's not always the mystery if seems to be.

  9. #9
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    For testing the ff? Without putting the boat on the water to se if it cleared up. What is my option. I haven't played with it yet so what's my best option.
    "Choices you make dictates the life you live"

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    If it is interference caused by the trolling motor running, it will do it whether in the water or not. Just let the motor down and turn on the unit. I would try it on the water after rewiring to be sure, but fishfinder she be wired directly to the cranking battery with a fuse. Be careful of transducer wire touching trolling motor power wires.

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