Installing a Trailer Harness in the bed of my pickup Click to view on Bing4:47In this video, I install a trailer 7pin wiring harness in the bed of my pickup for connection to a 5th wheel trailer. This is an almost required feature should you tow a 5th wheel.Author: RVProjectViews: 21K 5th Wheel/Gooseneck 90-Degree Wiring Harness w/ 7-Pole The Pro Series 5th Wheel Trailer Hitch w/ Square Tube Slider - Slide Bar Jaw - 16,000 lbs # PS30094 is compatible with the same standard 5th wheel rails as your 14K Reese Classic. So you only need to add the slider. You may want to consider adding the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness w/ 7-Pole Plug - Dodge - 9' Long # 51-97-411.4.8/5(63)Category: Custom Fit Vehicle Wiring Genuine Dodge RAM Accessories 82212195AB Trailer Tow Buy Genuine Dodge RAM Accessories 82212195AB Trailer Tow Wiring Harness for 5th Wheels and Gooseneck Trailer systems: Wiring - Amazon FREE DELIVERY possible on 4.7/5(20) Topic: Camper / 5th Wheel Electrical Receptacle - RV It works with my T/C or 5er. I found no need to change any wiring. Mine does not have a 90* connector on the back, it is straight in. It took me about 1/2 hour to make the initial install. Disconnect the connector from the back of the factory 7 wire receptical, then How To Replace 7 Pin Fifth Wheel Trailer Cord Truck Socket (Travel Trailer Owners: Follow the same procedure for bumper-attached sockets. Fifth wheel owners should always consider adding a socket inside the bed of the truck to avoid having the cord drape over tailgate.) 2. Remove two small screws from side of socket, and screw plug securing wires at the bottom to release the wiring harness. 3.