To Wire a 1989 S&S Camper, you have to install the pigtail that runs from the back of the truck to the converter. You need to make sure you have the correct pigtail for the brand and model of truck. You must Run the pigtail up through the bottom of the S & S Camper and wire it to the DC-to-AC converter. After that, connect the electrical wire to the opposite side of the converter and run that wire into the electrical panel. You should Mount the 40-amp breaker to the electrical panel and connect the wire running from the converter to the bottom of the breaker.
You can connect the ground wire to a screw on the side of electrical panel. Then, Pull wire from the electrical panel to the light switch beside the door of the S & S Camper. You have to run another wire from the switch to the light fixture. You need to Insert another wire from the bottom of the light switch and pull it to an outlet. You must Jump one wire from each outlet for any appliances you plan to install in the S & S Camper.