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Home Boating

Garmin 540S Depth Finder Not Reading

Hefe'Hefe' Posts: 22 Greenhorn
Had boat re-wired and flush mounted Garmin combo GPS (540S) and sonar unit. Sonar reads water temp, but depth blinks at 0.0 ft. Does not read depth. Transducer is flat positioned, so I check that (was knocked at angle before). Re-connected 12-pin this morning, same thing. Any ideas?
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