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Warning Buzzer Constant

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BJH_MN

New member
Model E70TLEDA

Upon turning key to right and when motor is running, the buzzer stays on. I’ve disconnected a few different sensors and still constant.
I’ve added a video link for details and better visuals of what I’ve attempted so far.

Thanks for your help!
 
Yeah, that’s what I was thinking. Any suggested way to test that theory?
I’ve disconnected the buzzer and checked continuity of the wire and when the key is turned, I have continuity when the key is off, continuity goes away.
 
BJH_MN said:
I’ll try a new buzzer/horn and let you know. Again, thank you.
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racerone said:
Defective " mini circuit " in the buzzer perhaps.
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Confirmed that the existing buzzer is not bad. I tried a new one and it constantly buzzes too.
Of course I should’ve known this because I have 12 V at those two wires that the buzzer connects to.

Any other ideas other than tracing the wire all the way back from the council to the motor and looking for a short to ground?

I believe that’s how this circuit works as it has constant 12 V and when a sensor goes bad, it grounds out the circuit which completes the circuit and the buzzing starts. This is ground to the motor I believe, and not my common ground from battery.
 
Yes, overtemp or low oil pressure provides the ground to engine block & starts the time delay counting.
However, your engine block is connected directly to the negative post of your battery and typically the ship's ground (as in dashboard & other accessories) are grounded to the engine block as well. So effectively it is all a big common ground point.
 
Droid said:
Yes, overtemp or low oil pressure provides the ground to engine block & starts the time delay counting.
However, your engine block is connected directly to the negative post of your battery and typically the ship's ground (as in dashboard & other accessories) are grounded to the engine block as well. So effectively it is all a big common ground point.
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I Appreciate that explanation. Did you watch my original video from post #1?
I’m pulling my hair out trying to get this buzzer to stop. As the original video shows, I’ve disconnected what I believe is all sensors.
Do you have some more thoughts please?
 
My prior reply was thinking I/O, not outboard. So the ship's ground is probably a second terminal at the battery negative post. Regardless, everything is one big ground.

If I recall, low oil gives one alarm (beeping maybe?), overheat gives constant I think, can't recall for sure. A factory manual would give clarification.

Since you're getting constant horn I'd look for a short to ground of the lead coming from the temp sender in the head or a faulty sensor. Disconnect the sensor. I know you said you youve disconnected a few different sensors. Are you sure you got the correct one? Follow the wire thru the clamps towards the harness.
 
Droid said:
My prior reply was thinking I/O, not outboard. So the ship's ground is probably a second terminal at the battery negative post. Regardless, everything is one big ground.

If I recall, low oil gives one alarm (beeping maybe?), overheat gives constant I think, can't recall for sure. A factory manual would give clarification.

Since you're getting constant horn I'd look for a short to ground of the lead coming from the temp sender in the head or a faulty sensor. Disconnect the sensor. I know you said you youve disconnected a few different sensors. Are you sure you got the correct one? Follow the wire thru the clamps towards the harness.
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I will do so tomorrow. Thank you
 
Droid said:
My prior reply was thinking I/O, not outboard. So the ship's ground is probably a second terminal at the battery negative post. Regardless, everything is one big ground.

If I recall, low oil gives one alarm (beeping maybe?), overheat gives constant I think, can't recall for sure. A factory manual would give clarification.

Since you're getting constant horn I'd look for a short to ground of the lead coming from the temp sender in the head or a faulty sensor. Disconnect the sensor. I know you said you youve disconnected a few different sensors. Are you sure you got the correct one? Follow the wire thru the clamps towards the harness.
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And yes, you are correct, constant buzz is overheat. When temp sender at the head is disconnected, still constant beep.
 
There is a temp sender like you said, but there should be a temp switch. Thats the one doing the buzzer signal. The sender should send a signal to your temp gauge on dash. The switch is a little different looking. Same for the oil sender and oil switch. Thats why when you disconnect the temp sender the switch is still sending the signal to Buzzzzzzzz!

Another note: The two switches should be using the same wire or at least same wire color and be connected to the buzzer.

Good Luck Sir!
 
Hey, I really appreciate this information as I am still chasing the buzzer ghost.
Any ideas on this model where I find the mentioned switch(es)?
 
Roadking57 said:
There is a temp sender like you said, but there should be a temp switch. Thats the one doing the buzzer signal. The sender should send a signal to your temp gauge on dash. The switch is a little different looking. Same for the oil sender and oil switch. Thats why when you disconnect the temp sender the switch is still sending the signal to Buzzzzzzzz!

Another note: The two switches should be using the same wire or at least same wire color and be connected to the buzzer.

Good Luck Sir!
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Outboard won't have a temp gauge.
 
You are correct there is no temp gauge on the dash cluster. As shown in one of the videos, there is a warning gauge for all four of the possible warnings and that warning gauge is what the buzzer is connected to.
Please elaborate where the mentioned switches could possibly be.
 
Very tough to tell you where on the engine to look. Unless someone has the same engine and knows. Sorry about the difference of an outboard not having a temp gauge. One suggestion is find a picture of what the switch looks like on a parts list, then go and find it on yours. To confirm it, find a wiring diagram and check to see what color the wires are supposed to be. Hopefully no one changed anything.
 
Have you tried looking in the back of an owners manual? I found some simplistic diagrams for my I/O in an online manual. I don't know if they do that in an outboard manual or not.
 
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