I'm looking for simple break down of how the Horizon depth sounder on my 1999 1900SR works. It's a small LCD display with a three postion, spring loaded, toggle switch. I've tried looking at Horizon's site for a manual, no luck there. It should be simple enough, but attempts to change the settings doesn't seem to work. I figure I'm doing something wrong.
Thanks SP, for the help with boat owner's manual, I was eventually able to get one through Maxum. It took several attempts, but I finally found a link that worked. It's great to have those electrical schematics.