Hi, sorry for starting yet another senors thread. I bought my new 28bhe last fall and didn't get to use it until this weekend. The fresh water sensors don't seem to work. The dealer is 1200kms south so I have to fix it myself. If it's the ground can I test that by adding a ground wire to the bottom wire(white wire) and go direct to the frame? I can't reach the other end of the current ground to see if it is that end of the connection.