The wiring that feeds the 12-volt accessory circuit on the 7-way trailer connector is of too small a gauge to allow enough power to pass through to run a winch. The main function of that circuit would be for lighter-duty applications, such as providing power for interior trailer lights or to maintain a trailer mounted battery.
The Bulldog Winch Trailer Winch - Wire Rope - Roller Fairlead - 4,400 lbs, # BDW15019, will require some power as it draws 28 amps at 0 lbs but 340 amps at full... view full answer...
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