Quote Originally Posted by petesos View Post
Have traced the 2 wires from the rocker switch to the vfd
Red wire goes into vfd UX1
Black wire goes into GND on vfdClick image for larger version.  Name: IMG_20200904_155707.jpg  Views: 2303  Size: 223.5 KB  ID: 28797Click image for larger version.  Name: IMG_20200904_155737.jpg  Views: 2318  Size: 304.7 KB  ID: 28798
Not sure if this is relevant or not.

Looking at ports and pins outputs they appear to be on port 3 and everything else is on port 1