Quote:
Originally Posted by Flybob
The Aux pin on the 7 way may have had 12V, but a dead battery coupled with the brakes being connected may have been insufficient to engage the brakes and it was not until the brake controller applied more power that they activated.
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Seems very reasonable. The inability of that 12v source being able to provide many amps also caused problems trying to run a 3 way fridge on 12V while traveling because you wanted the gas off or had pilots blow out. The fridge would run down the camper battery faster than the 12v pin could resupply it. Dead battery at the end of the day and a warm fridge.
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