Yamaha Blaster Headlight Wiring Diagram Unique Yamaha Key Switch ... Yamaha Blaster Headlight Wiring Diagram Unique Yamaha Key Switch Wiring Diagram Inspirational Wiring Diagram For32 Amp Plug Wiring Diagram - 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.. When you purchase a MegaSquirt ® kit, the components typically arrive individually packed, with part numbers. As a result, while you should verify that you have received all you ordered, it is not necessary to identify each item by color, markings, etc.. At the bottom of this page is a list of page links to every page in our website..