Radio Wiring | Motorhome Matters | Motorhomes Forum Campfos - 2016-02-27 8:44 PM I have a 2014 Sunlight T66 on a fiat Ducato chassis. Now this only works when the ignition is on so when you are stopped no radio. i all other vehicles I have used / owned the radios all work on the first position on the ignition switch. Can this be done and does anyone know where I can get a wiring diagram for this change. Radio wiring | Motorhome Matters | Motorhomes Forum The standard radio may not be the best, but it is designed to be ultra low power consumption as it is expected the Motorhome may be parked up over a longer time. Radios in cars don't need to be ultra low power consumption because 'the car gets used every day' so usually no issue drawing 12v power to store the tuned stations, audio settings, etc. Tiffin Motorhome Wiring Diagram | Free Wiring Diagram Assortment of tiffin motorhome wiring diagram. A wiring diagram is a simplified standard pictorial depiction of an electrical circuit. It reveals the elements of the circuit as streamlined forms, and the power and also signal connections between the gadgets. Home [winnebago] The towable for kids who never grew up. The space-making features in Winnebago’s toy hauler lineup are designed for those who want to get out and play, but don’t want to leave their playthings behind.