Forum Discussion

Kelpike's avatar
Kelpike
Explorer
Aug 11, 2020

Breakaway Switch Confusion.

I recently purchased a 2003 25' Coachman travel trailer. The breakaway switch was crushed on the trailer so I replaced it but I am confused about the power for it. The old one only had 2 black wires coming out of it and going to a white and blue wire on the trailer. Those 2 go into the junction box in the trailer. The new one has 3 wires, blue, white, and black. First, what do I connect the black wire to? And second, it says make sure I disconnect the trailer plug before testing the breakaway. Does that mean it will draw power from my trailer battery?
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Aug 11, 2020
    X2, Old Biscuit. After repair, test it! My life may depend on it working.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Aug 11, 2020
    NO....
    It means if still connected to truck and breakway switch is closed it COULD (COULD) backfeed and cause issue with the Truck Brake Controller

    As for the wiring----
    the white is a ground wire, blue wire which will splice into the brake wire coming out of your trailer connector and a black wire which will connect to the breakaway box.

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