Ford Ranger Trailer Wire Harness and Connector - Best Notes: Trailer wiring harness. Plug-In Simple(R) Vehicle to trailer wiring harness. With towing package. ADD TO CART Vehicle Specific 1988 Ford Ranger Trailer Wire Harness and Connector; Hide Year Range for Ford Ranger. Core Parts. Return core parts to the store to be refunded the price. Ford Ranger Trailer Wiring Harness | Advance Auto Parts Your Ford Ranger will be happy to know that the search for the right Trailer Wiring Harness products you’ve been looking for is over! Advance Auto Parts has 4 different Trailer Wiring Harness for your vehicle, ready for shipping or in-store pick up.