Wiring Harness - Hayes Brake Controller Co. 14 rowsFor 60 years Hayes has manufactured the safest, easiest to install and most reliable line of electronic trailer brake controllers available. Hayes prides itself on the belief that the dealer's knowledge of products coupled with the services they deliver is the key to success. Amazon: hayes brake controller wiring harness Amazon's Choice for hayes brake controller wiring harness. Hayes 81780 Quik Connect Dual Mated Chev/GMC 2007-2003 Wiring Harness. 4.6 out of 5 stars 19. $9 $ 9. 46. Get it as soon as Tue, May 28. FREE Shipping on orders over $25 shipped by Amazon. Only 6 left in stock - order soon. Trailer Brake Controllers | Sway Control | Hayes Towing Brake Controllers & Trailer Sway Correction. Designed and developed by Hayes Towing Electronics/Syncro Corporation engineering with assistance from Auburn University and outside automotive car and truck vehicle stability control engineers, the SwayMaster® is designed to provide simultaneous braking when sway is detected to all trailer brakes on 1 to 4 axle trailers.