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Thread: 24 volt to 12 volt for a reailer brake controller

  1. #11
    Join Date
    Apr 2008
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    no where
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    439

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    There are a bunch of examples on the internet on wiring relays.
    here are a few to look at.

    http://www.the12volt.com/relays/relays.asp

    www.installdr.com/TechDocs/999404.pdf

    Andre Ducote
    1999 Royale

  2. #12
    Join Date
    Jan 2006
    Location
    anytown
    Posts
    8,908

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    Bill,

    That is why I mentioned the trailer receptacle earlier. On both my Prevost coaches the toad plug wiring had relays for each circuit (brake, park, turn signals) and the bus lights powered the relays which switched power from the 12 volt post.

    You are correct in that it can likely handle the load. You may wish to follow your circuits however to make sure everything in there is sized to handle the extra load. You could have insufficient wire size, a circuit breaker or relay of inadequate size or you could have relays limited to the amperage you pull for the lights. You would not want to need a fast stop and then find the trailer brakes won't work because you tripped a breaker, or worse started cooking some wires. I can speak authoritatively about how ugly it gets when your Prevost is burning.

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