Can any of you help me? I have a chevy kodiak 4500 pullin g a 21 foot enclosed trailer. Everytime I turn off my truck the lights on the back of my trailer don't shut off, they stay on as if the truck was on. This isn't the automatic lights shutoff either because they still stay on after that. I think this started to happen after my dealer changed a faulty Battery on the truck. Any help would be appreicated.