What is the correct fuse for my Depthtrax? NMP Support Center July 02, 2019 13:05 Updated Follow The fuse used in the depth finder is a .25A, 250V fuse. Related articles Depth Finder Alarms I glued the transducer in hull and all I get is "---" readings on my display. Glue-In Transducer Instructions with Illustrations My In-Dash Depth Finder Won't Turn On The LCD on my HawkEye In-Dash Depth Finder (DF1000D) is very dim, sometimes I can't even tell if it's on. I know it's on because I can hear the alarm sound when I turn it on. Comments 0 comments Please sign in to leave a comment.