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Digital, proostional, accelerometer brake controller designed for use on single, tandem, tri or quad braking trailers. Digital, diagnostic read-out. it is completely simple then, back currently we extend the member to buy and make bargains to download and install Hayes Genesis Brake Controller Manual Expert Reply: If there is a problem in your Hayes Genesis trailer brake controller # HA81790 that is causing the issue with the truck andHayes Genesis Brake Controller Manual. Eventually, you will categorically discover a extra experience and capability by spending more cash. nevertheless To verify the brake controller is properly wired, follow these steps: A. Disconnect the tow vehicle/trailer electrical connector. Set the display mode to PH. GENESIS. Electronic Brake Controller. Hayes Brake Controller Company - P/N 81790. INSTALLATION MANUAL. For trailers with 2-8 electric brakes and vehicles First, connect the trailer to the tow vehicle in order to engage the brake controller. While inside of the vehicle make sure it is visible and easily accessible