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Would 12 Volts on Brake Output Circuit Make Trailer Brakes Lock Up  

Updated 12/27/2018 | Published 12/23/2018

Question:

If you have 12V to the seven wire trailer plug on the vehicle brake wire and plug a trailer in without having the controller plugged will the trailer brakes be fully applied? Thanks,

1

Helpful Expert Reply:

If you have 12 volts present on the brake output circuit of a 7-way (5:00 pin) and you connect a trailer with brakes the brakes should lock up all the way.

expert reply by:
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Jameson C

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