3400 lowrance

Discussion in 'Sport Cruisers' started by Rapidroy5858, Sep 25, 2018.

  1. Rapidroy5858

    Rapidroy5858 New Member

    22
    Sep 23, 2018
    1990 searay sundancer 270
    Twin 4.3 mercruiser
    Trying to figure out how the 3400 lorance unit in my 1990 270da works.
    It's not on at engine start up and I can't find a switch anywhere, does anyone know it it's supposed to be on at start up or am I missing something.
    Thanks in advance!
     
  2. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    There is usually an accessory switch for many of our electronics. Do have have an "ACC" switch someplace? Do all the rest of your electronics at the helm work? Have you checked all the breakers/fuses?
     
  3. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    It could be wired to come on at startup... it could be wired to a switch... follow it's wires behind the dash. Or, it could be not working. Follow wires - check for power - see if the ducer is clicking.
     
  4. Rapidroy5858

    Rapidroy5858 New Member

    22
    Sep 23, 2018
    1990 searay sundancer 270
    Twin 4.3 mercruiser
    I will trace wires. See what I find.
    Thanks
     
  5. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Chattanooga TN/Dickson TN
    1998 SeaRay 290 Sundancer
    Twin EFI 5.0L w/Alpha 1 drives
    I think the switch on my boat is labeled "sounder"
     

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