2012 Ford F 350 Wiring Diagram - View and Download Ford F-250 2012 owner's manual online. F-250 2012 Automobile pdf manual download. Also for: F-350 2012, F-450 2012, F-550 2012.. Video Transcript for Hopkins Wiring 37185 Review. Today we're going to be reviewing part number 37185. This is an adapter that's going to convert from 4 pole wiring on your vehicle to a 7 pole round plug and 4 pole flat plug..