Hi Raider,
Not sure someone got similar problem likes me. Apparently, I bought a new GFS-10 fuel sensor to connect to my Fish Finder 556S. Just follow the instruction to connect all cables from the box picture, however I was struggling to make my Fish Finder to detect new sensor. I called Garmin support line and they are USELESS. Talked to their call center somewhere in India, the operator does not know what they are doing. Finally, she said Garmin Marine support department will give me a call within 24-48 Hrs. Until now I got jack from them. Never buy Garmin product again. I have few pictures. If someone here has some experience. Please help me to troubleshoot this. Thanks a lot
Cheers