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2nd Gen DC to DC Trailer Battery Charger

Discussion in '2nd Gen. Tacomas (2005-2015)' started by riverrat14, Nov 22, 2023.

  1. Nov 22, 2023 at 8:25 AM
    #1
    riverrat14

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    riverrat14 [OP] Member

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    Need help with DC to DC trailer battery charger installation to LiPO4 battery.
    Where to get 12v ignition ON signal to turn on battery charger ?
     
    riverrat14, Nov 22, 2023
    #1
  2. Nov 22, 2023 at 10:06 AM
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    nd4spdbh

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    nd4spdbh Well-Known Member

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    The 12v charge line on the 7 pin is switched with key on.
     
    nd4spdbh, Nov 22, 2023
    #2
    Dm93 likes this.
  3. Nov 22, 2023 at 10:36 AM
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    riverrat14

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    riverrat14 [OP] Member

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    Not switched...always Hot
     
    riverrat14, Nov 22, 2023
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  4. Nov 22, 2023 at 10:53 AM
    #4
    riverrat14

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    riverrat14 [OP] Member

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    Renology DC to DC battery charger install recommends getting D+ signal from Alternator starter switch connection.
    The DC to DC charger has an internal switch to turn ON/OFF the charger to avoid starter battery drain.
    This requires running a signal wire all the way back to the battery charger mounted in trailer.
    The trailer charge circuit is ON continuously. Does not turn ON/OFF with ignition switch.
    I would prefer a method to turn OFF/ON the trailer charge circuit at the truck electrical output.
     
    riverrat14, Nov 22, 2023
    #4
  5. Nov 22, 2023 at 11:32 AM
    #5
    nd4spdbh

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    nd4spdbh Well-Known Member

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    12v at the trailer plug is not hot when the truck is off

    upload_2023-11-22_11-25-18.png

    IG1 No.2 fuse that powers the batt charge relay is keyed on via the AM1 circuit

    upload_2023-11-22_11-32-27.png
     
    nd4spdbh, Nov 22, 2023
    #5
    6 gearT444E likes this.
  6. Nov 25, 2023 at 9:06 AM
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    riverrat14

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    riverrat14 [OP] Member

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    Thank you for your great response...
    As I more carefully inspected the fuse box I found Trailer 30A BATT CHG relay missing and JUMPED OUT !
    Will install relay and test as before....Ya never know....
     
    riverrat14, Nov 25, 2023
    #6

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