Okay, I believe I've found what the problem was or is, I'm thinking it's the GPS puck I have plugged into the unit, it's mounted just behind the head unit on a thin metal bar. The GPS puck is magnetized on the bottom, I'm thinking the magnet is interfering with the transducer somehow. For whatever reason it does seem like there is some interference with the transducer not sure if the magnet would be causing this a magnetic interference. I unplugged the GPS connection and the sonar started working. I have a handheld Garmin GPSmap 76 so this is just going to be a minor inconvenience.
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