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  1. #1
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    New member with a question

    Hello all. We have 2020 337RLS and couldnít be happier with this fifth wheel except... batteries donít charge on 30amp shore power. Have pig tail purchased from Dealer for 50 to 30. Whereís a good place to post this question on this site?
    Happy to be on the Grand design owner Team

    Mark

  2. #2
    Paid my dues 😁 FT4NOW's Avatar
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    Welcome to the forum. Do the batteries charge on 50A shore power? If yes, there is probably an issue with your adapter.

    Is the battery disconnect switch in the correct position? (Easy way to tell is if you disconnect from shore power and still have 12v power or if connected to shore power and turn off converter breaker and still have 12v power)

    Sent from my SM-G950U using Tapatalk
    2021 Reflection 311BHS
    2018 F350 CC/LB/Firestone bags/Reese Goose Box

    SOLD - 2017 Momentum 399TH
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  3. #3
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    Thanks for the quick reply FT. Yes no issues with 50 Amp charge. Trailer cord has blue light illuminated when plugged into adapter - only one leg but that is what you get with 30 amp. Talked to GD customer service but they didn’t have any idea on what issue is other than the the battery switch question is it in the on position.

  4. #4
    Site Sponsor
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    Quote Originally Posted by mscatlo View Post
    Thanks for the quick reply FT. Yes no issues with 50 Amp charge. Trailer cord has blue light illuminated when plugged into adapter - only one leg but that is what you get with 30 amp. Talked to GD customer service but they didn’t have any idea on what issue is other than the the battery switch question is it in the on position.
    If there is no issue charging with 50A service, it sounds like the 30A to 50A adapter is not powering both legs of the 50A service (which it should), and your charger is on the unpowered leg. You need an new 30-50 adapter. Note: A 30A adapter should power both legs of a 50A cord, but you will be limited to a total of 30A.

    Chris
    Chris & Karen
    Fort Collins, CO
    2017 F-350 SRW 6.7 Lariat Value CC LB 4x4
    2018 Solitude 310GK

  5. #5
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    Quote Originally Posted by mscatlo View Post
    Thanks for the quick reply FT. Yes no issues with 50 Amp charge. Trailer cord has blue light illuminated when plugged into adapter - only one leg but that is what you get with 30 amp. Talked to GD customer service but they didn’t have any idea on what issue is other than the the battery switch question is it in the on position.
    Your adapter is bad.
    Inventory Manager at Tom Schaeffer's RV, Shoemakersville, PA www.tomschaeffers.com
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    2011 RAM 3500 SRW Outdoorsman Edition 4X4, 6.7 Cummins--TWEAKED!
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  6. #6
    Site Team Second Chance's Avatar
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    Mark,

    I have moved your thread to "Electrical System and Wiring." The folks who have responded are giving you good ideas to follow up on.

    Rob
    U.S. Army Retired
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    2012 F350 DRW CC LB Lariat PS 6.7
    2020 Solitude 310GK-R, MORryde IS, disc brakes,
    Sailun LRG tires, solar, DP windows, W/D
    (Previously in a Reflection 337RLS)
    Full time since 08/2015

  7. #7
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    Thanks all for the responses. Easy fix one that I can handle.

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