I doubt you'll find one but they all make home runs back to the load center and probably are fuse behind the small removable panel on the converter/charger. both the power and grounds are there. The power comes from the same wiring as the parking lights at the 8 pin plug. They are hateful devices and very prone to bad connection at the light or the bulb socket they are also through wired so if the first connection is bad the rest won't burn.