Join Date: Mar 2012
Location: Portland, ME
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Re: Help figuring out this engine buzzer circuit
I think your wiring diagram is wrong. You can find the wiring diagram for the Westerbeke admiral and captain panel here:
On roughly page 40 or so (though the page label says 32)
If I remember right the audible alarm comes in with either oil pressure (steady) or water temp switch (pulsing).
As a previous poster said, it does that because the switch (es) close to ground when in fault and thus complete the circuit.
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