ST60 Wind Direction No Longer Working

[svbloom]

Thanks Chuck. We did the recommended test and Red to Shield was 7.97 volts and all others were in the recommended 2-6 volt range. We tested it with the head unit still integrated into the rest of our system and then we unplugged it to isolate it as you suggested. The problem persists. Irratic wind direction needle. Is there a way we can determine if the issue is the head unit or the wind transducer/vane? We need to figure out exactly what needs replacing. Thanks!