If you turn on the key switch and put a voltmeter between the wire to the o/p sensor and ground, there should be 12V approx there. If there is voltage and you ground the wire, the buzzer should activate. If there is no voltage check the other end of the wire and chase the problem from there. There is a possibility that the plug in the engine harness is not functioning well due to corrosion or a break in a wire.
Rich > On Oct 30, 2013, at 15:32, bria...@aol.com wrote: > > Careful about that assumption. According to the Yanmar rep. that I spoke to > at the Annapolis Sailboat Show, that switch only tests the light and buzzer > by supplying power to them. It DOES NOT check the entire circuit to the > sensor/switch. > > Bill > > MYSTY > Landfall 39 > > In a message dated 10/30/2013 2:06:05 P.M. Eastern Daylight Time, > r...@sailpower.ca writes: > Yup. That's what I though. > > R > > > > > > On Oct 30, 2013, at 2:50 PM, Jim Watts <paradigmat...@gmail.com> wrote: > > OP said the buzzer worked with the test switch...so far we are assuming he > didn't just imagine the whole thing. > > >> On 30 October 2013 10:46, Rich Knowles <r...@sailpower.ca> wrote: >> True statement. I suggested earlier that if it does not sound when the wire >> is grounded the problem is elsewhere. >> >> A resistance/continuity check across the sensor will quickly tell if it's >> faulty. No oil pressure should yield a direct short. >> >> Rich >> >>> On Oct 30, 2013, at 14:36, Bob Dryer <bob07...@gmail.com> wrote: >>> >>> >>> Message: 4 >>> Date: Wed, 30 Oct 2013 10:47:08 -0300 >>> From: Rich Knowles <r...@sailpower.ca> >>> To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> >>> Subject: Re: Stus-List I need a little help with a sender. >>> Message-ID: <0e3b7b13-bc0f-452f-a0d7-ddbe3fbea...@sailpower.ca> >>> Content-Type: text/plain; charset=utf-8 >>> >>> Yes. The sensor connects the wire to ground when there is no oil pressure >>> and that sounds the buzzer. If the sensor is defective, it will not connect >>> the wire to ground and the buzzer will not sound. >>> >>> So... If you connect the wire to ground, you are doing what the sensor >>> should do, and the buzzer will sound. If the buzzer does then sound, the >>> sensor is faulty. >>> >>> Rich >>> >>> Wait a sec. >>> >>> If the buzzer (or a connecting wire) is defective the buzzer will not sound >>> PERIOD. >>> >>> Bob >>> _______________________________________________ >>> This List is provided by the C&C Photo Album >>> http://www.cncphotoalbum.com >>> CnC-List@cnc-list.com >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com > > > > -- > Jim Watts > Paradigm Shift > C&C 35 Mk III > Victoria, BC > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
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