Hello everyone, I am new to this forum and this is my first post! I bought a freightliner Columbia with a bentz bunk on it. I just bought it and there are a lot of systems that are not working. where do I find service manuals for these things? What I especially need is wiring diagrams and how they tapped into the original freightliner harness. Does anyone have anything good bad or indifferent to say about these things? It seems like a big camper