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How To Diagnose 2001 Horizon 210 Alarm
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Author:  rdempsey225 [ Fri Aug 29, 2025 4:17 pm ]
Post subject:  How To Diagnose 2001 Horizon 210 Alarm

Would anyone be able to send me down the right path for diagnosing the alarms I'm getting?
What put me onto this forum is some of the valuable insights shared about similar issues. For context, I bought this boat used on a whim, in July 2025, after the owners (who inherited it :P ) suddenly needed to move, couldn't take it with them and all but gave it to me. So I've only been able to take it out about 6 times. Other than these alarms and a couple gauges not working (ex. Speedometer) it seems to run great. Cranks easily, motor sounds good but there is obviously some underlying issue behind the alarms that are going off. As you can see in the following videos, the alarm tends to go off when I'm idling or going very slow. It seems to correlate to low battery voltage as my panel displays a lit up battery warning and low voltage (not sure if those are working correctly). Sometimes the alarm goes off on its own after a few seconds and sometimes It goes off immediately when I press the "SET" button. It's usually a very loud and constant sound vs beeping. I've read posts about potential oil pressure sender or sensor issues. I've also read about depth alerts and voltage alerts. Could be all or could be 1. Not sure. Just curious if any of you recognize the alarms and symptoms and what you did to track down the root cause.

short vid 1
https://drive.google.com/file/d/1oYpHGVn2d7E2nRrA4V-aExk2_JSfW5e0/view?usp=drive_link

short vid 2
https://drive.google.com/file/d/1mRd3qiIBCjeULX5sExcyvMShdQzHAjyp/view?usp=drive_link

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