Anyone recognize this wire/module

trimmkmtrimmkm Member Posts: 16 ✭
in Electrical Discussions
While preparing the boat for winter, I found a loose wire with an inline module.  It appears that it wasn't plugged into anything.   There is a small circuit board potted in the module. I can't see under the engine without a scope.  Does anyone recognize this? 

This was in a 2015 Captiva 236 CC, with 350 Mag MPI, and Bravo 3 drive. 



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  • aero3113aero3113 Member Posts: 9,776 ✭✭✭✭✭
    Strange, I never seen anything like that on my engines.
    2008 330EC
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    Let’s see the connectors. 
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • mvnmvn Member, Moderator Posts: 763 mod
    edited November 2022
    Judging by the potting job, it looks home built to me as it resembles an ice cube tray shape.  Only way to really tell is to find out what it's connected to.
    Good,  fast,  cheap.... pick two. 
    2019 MTX20 Extreme
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  • trimmkmtrimmkm Member Posts: 16 ✭
    I’ll try to get a pic of the connector on the weekend, but it’s a small diameter (~1/4”), two pin connector.  The cable is 2 conductor, I think 24AWG.  It joins the wiring harness on the port side of the engine, and appears to head forward on the port side of the boat.  I’ll try to see where it goes.  
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  • LaReaLaRea Member, Moderator Posts: 8,066 mod
    Doesn't look like any Merc part I've ever seen.  It's too small to provide power to anything except maybe LED lighting.  Maybe a tank level sensor? 
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  • aero3113aero3113 Member Posts: 9,776 ✭✭✭✭✭
    It’s a bug, your boat was probably once owned by a mob boss.
    2008 330EC
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  • Black_DiamondBlack_Diamond Member Posts: 5,439 ✭✭✭✭✭
    That does look home-made. 

    Past owner of a 2003 342FV
    PC BYC, Holland, MI
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  • trimmkmtrimmkm Member Posts: 16 ✭
    So, mystery solved.  The previous owner had a bilge plug light installed, this was the LED driver for it.  
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  • rasburyrasbury Member Posts: 8,944 ✭✭✭✭✭
    It's always a Flux capacitor if you can't figure it out...
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