Open ground at pedestal. You should be using an EMS like progressive Industries or Surge guard. It would have told you you have a problem and cut the power to your rig. These devices can save you a lot of money by protecting all your electronic devices in the trailer. You never know what you are going to get when you plug in.
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Jason & Wendy
2014 F350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
B&W Patriot 16k fifth wheel hitch
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