I am helping a friend trouble shoot his Raymarine system. At the end of last year we lost the speedometer. Our first step is to test the transducer/wheel. The instructions from this forum says to test the green wire and the shield coming from the transducer.
The back of the instrument looks like this. Which of the wires here do i test to see the fluctuation in resistance to test the transducer output?
![[Image: 20170408_170431.jpg]]()
The back of the instrument looks like this. Which of the wires here do i test to see the fluctuation in resistance to test the transducer output?
![[Image: 20170408_170431.jpg]](http://i297.photobucket.com/albums/mm205/Photobug_08/20170408_170431.jpg)