JB, what is the model number of the cord reel? Should be on your build sheet if you can't see it on the canister. If you don't have the build sheet, call Monaco with your coach number or last 6 of your VIN and they'll email it to you. Good to have for a number of things. If yours is like mine you can access the canister through the electrical compartment. There's a short cord that runs from the canister to the transfer switch. Personally, I'd start at the transfer switch and work backwards. I'm guessing you have a loose wire inside the box. Remove the lid, after making sure everything is disconnected and tighten all the wiring inside the transfer switch box. I think you'll find one of them is loose......Dennis