ITC-5 Issue?

[mgcondon]

Greetings, I recently installed a Seatalk NG network, two i70, a p70, and an i60 wind instrument, AIS650, AIS100, ITC-5, and an NMEA0187 converter. The network has three 5-way connectors that link the instruments, my SG3 autopilot, E127 display, and VHF. The wind, speed, and depth transducers are all from my previous Seatalk network with ST60 displays. The old network and displays were completely removed.

All works well with the exception of the wind direction. Both the i60 and i70 displays show the wind speed correctly, but the direction indicator hovers between 180 and 195 degrees no matter what position the boat is relative to the wind. I read the masthead test procedure on another thread and performed that today. When powering the transducer with an independant 8v supply I read from blue to shield 3.46v, green to shield 5.1v, and yellow to shield 0.2v - all within the parameters. I then tested with the ITC-5 connected and read to shield 2.4v blue, 3.65v green, and 0.15v yellow. I only registered 6.0v red to shield. With the exception of the apparent low voltage all is within the specifications. To be certain I had good connections I replaced all of the female spade terminals and tried again with the same results. All of the equipment was purchased 5 months ago and installed in January.

Any help would be greatly appreciated.