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Old 02-19-2014, 12:20 AM   #1
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Trailer Brake Power

Are nthe AS trailer brakes powered by the "House Batteries" or from the tow vehicle umbilical cord??
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Old 02-19-2014, 02:04 AM   #2
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From the tow vehicle batteries.
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Old 02-19-2014, 03:47 AM   #3
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The break away switch is powered by the house batteries.
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Old 02-19-2014, 09:05 AM   #4
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Quote:
Originally Posted by montanapat View Post
Are nthe AS trailer brakes powered by the "House Batteries" or from the tow vehicle umbilical cord??
This is the third post of the same question worded differently. Try combining them into one thread so the answers will be all together. Running lights, tail lights, and brake lights are powered from the TV. Breakaway switch for brakes in case of catastrophic failure is powered by house battery. To legally tow YOU MUST HAVE BOTH UMBILICAL CORD TO TV TO POWER RUNNING LIGHTS AND A FULLY CHARGED AND CONNECTED HOUSE BATTERY.
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Old 02-19-2014, 09:56 AM   #5
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Do you have an umbilical cord on the trailer with a 7 pin plug on it? Do you have a 7 pin receptacle on the truck and a brake controller in the truck?

If you have the truck wired take a volt meter and read between the 2 lower pins on the truck receptacle while someone steps on the brakes and then moves the manual handle on the controller. If you see voltag in each of these 2 experiments the truck is fine.

Connect the umbilical cord. With a compass held to the wheel and close to the bottom of the brake drum see if the compass needle moves when someone applies the brakes. This will test the complete electrical system of the brakes. It does not mean the brakes are adjusted correctly or the mechanical parts are good. Removal of the brake drum and visual inspection is next.
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