Quiet warning horn.

[Sirrobin53]

There is a potential voltage between the +12 and the signal "Tan" wire. That potential lights the LED dimly to my advantage. It shows that the LED is working. When there is a fault, the LED lights in conjunction with the horn. Solid beep, solid light. Intermittent beep, intermittent light. I'm good to go . And on key up, a single flash with the key up beep.

 

[Fed]

I guess some of the circuit wizardry in the vro pump or bottle could be causing the led to glow.
There's a member here who actually knows what's inside these 'black boxes', I think his name is Werner.

 

[Sirrobin53]

I would like to know too. Seeing as I have a bad one.....I might dissect one.

 

[Sirrobin53]

Fed,
There is 3.3 volts between the tan terminal and the +12 terminal. I don't know why it's there, but it keeps the light lit very dim in the key RUN position. If I could upload a video of it working then we could concur or disprove it's function. I got pics to load (finally ) and would like you to see it function. As you said, adding a little brain to the oil circuit for the warning horn to sound every 25 seconds is functioning and the light flashes with the horn.when I GROUND the water temperature sensor at the head the horn is continuously sounding and the light is a constant on. I believe that the light and horn follow your explanation for the various sensors function.

 

[Sirrobin53]

When I was doing the overheat warning I was connecting and disconnecting the jumper. Should have had that in video.

 

[Sirrobin53]

Can't load video, sorry.

 

[Sirrobin53]

https://youtu.be/jdi26YBCW_8
Maybe this? The first key up I didn't have the sunlight under control but it can be seen in the first few frames. The second 2 flashes are low oil every 25 seconds or so. The overheat warning was tested by grounding the sensor at the block.I intermittently touched the jumper to ground and at touching, the light and horn follow each other as shown in the last few frames. IMHO, it is working as it should. I will add that at NO TIME could I hear the horn. I was thinking about a solid state relay to run my air horns........
This is a 1994 Sea Nymph Sport Stinger with 1994 warning system. The 150ELEOM was a repower in 1995. I believe that the system was changed in 1996. I also believe Fed has the warning horn operations correct in previous post. My light and horn follow his logic to the letter.
MANY THANKS TO ALL THE MEMBERS who's input helped with this project.
Sirrobin53