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Bow thruster on OS 345 - No power at switch

Discussion of batteries, chargers, wiring, generators, distribution panels, battery switches, etc.

Topic author
Billan
Junior Member
Posts: 3
Joined: Tue Sep 29, 2020 3:41 pm
Vessel Info: 14 345

Bow thruster on OS 345 - No power at switch

Postby Billan » Tue Sep 29, 2020 3:53 pm

Bow thruster on a 2014 345 stopped working after a day of open ocean fishing. Joysticks don't turn on, no power at the toggle switch in panel. Bow thruster batteries on starboard side of the V-berth test fully charged. I have power on input side of the Bow Thruster Main. The breaker above "thruster charger" trips randomly when debugging. What is this cable for? Is this the charging input for the bow thruster batteries? The gauge seems a bit small for a charging circuit. Also no voltage detected on this thruster charger cable. 5 amp fuse at thruster motor is fine. Does anyone know how this fuse box works? What tells it to close the circuit? Front of box says spare 200amp fuse inside but do you have to unscrew everything to get at it? If the main 200amp fuse blew would I expect to not have power at the thruster switch in the cockpit panel? Thanks for any help!

BTM.JPG
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Topic author
Billan
Junior Member
Posts: 3
Joined: Tue Sep 29, 2020 3:41 pm
Vessel Info: 14 345

Bow thruster on OS 345 - No power at switch

Postby Billan » Tue Sep 29, 2020 3:56 pm

Here is a pic of the bow thruster main from the boat.
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Topic author
Billan
Junior Member
Posts: 3
Joined: Tue Sep 29, 2020 3:41 pm
Vessel Info: 14 345

Bow thruster on OS 345 - No power at switch

Postby Billan » Wed Sep 30, 2020 11:30 pm

Update for anyone else that runs into this. Thrust charger only has power when generator is on. Shore power does not charge these batteries so that post is only hot when generator house battery charging is on. The second main issue was the 200 amp ANL fuse inside this control box. Unknown why this blew but had the thruster cleaned and it could have been old. Power to switch is only supplied when this fuse is good.

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