HEATER, BACK SEAT 1955-06 Back Seat Heater Keep your Jeeprm in the winter with the Rugged Ridge Back Seat Heater. This 300 watt 12 volt heater will warm your vehicle quickly keeping you and your passengers comfortable. Designed to fit on the rear wheel well of any Jeephis easy to use heater wires easily to your existing electrical system. Some drilling may be required.