Re: A54 bow thruster directly to battery or through main switches?
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I am very sure you've checked this, but it sounds like an intermittent break in the low amp control circuit, and probably the low position sensor (analog or newer sensor) and/corresponding relay(s).
Another 54 owner experienced exactly this problem. He found the low position normally closed analog push botton to be defective. Yet another had the same problem and found 1 of the 4 relays to be faulty.
I think you can test the control side of the motor's high amp solenoid switch for control-side loss of power this way: Lower the BT. Disconnect the large red positive wire. Hold the joystick to either side while checking amps on the control side of the large solenoid. Hold the switch long enough to have experienced a shutdown based on previous experience. If necessary, repeat in the other joystick direction. I believe that the above will tell you if it is the motor or the control circuit.
CW Bill Rouse
Amel Owners Yacht School - www.AmelOwnersYachtSchool.com
720 Winnie St
Galveston Island, TX 77550
On Sun, Feb 9, 2020, 2:17 PM Matt Salatino via Groups.Io <firstname.lastname@example.org> wrote: