Warning Horn

[bassin98]

What activates the warning horn when you first turn on the key ? I have a 1986 150 XP evinrude model #E150STLCD. I can ground the temp sensor on the heads and the horn will sound. I guess that the wiring & horn are O.K. It just does not sound the test sound. It has a 4 wire VRO if that makes a difference.
Thanks Don

[ChampioNman]

The system checks low oil, no oil, over temp and fuel restriction. But will not alarm on all of them at turn on of the key. You will only get a beep, unless a fault is emcountered.

[bassin98]

I need to know what makes it beep when you turn key on. When I turn the key on it is silent. I can't find anything disconnected. When you turn the key on it is supposed to beep to tell you the horn is working.
Thanks Don

[SEAHORSE]

Only later model warning horns have the initial key ON beep. They are gray and black plastic horn assemblies with a separate ground wire on them, besides the tan and purple leads. Electronics inside the horn body make the initial beep using the 12V purple and the ground wire. I think it was about 1994 but I don't remember exactly.

If you have the original 1986 warning horn, then NO BEEP when you turn the key ON.

[Sportwin]

What SEAHORSE said!

Your horn is working as designed.

You can upgrade to the new style horn and it will self test each time you turn the key on.

[bassin98]

Thank You
I just wanted to make sure i didn't fry anything.

[Bob Ware]

Having upgraded to the new 'horn' on my '87 two years ago I can attest to the comfort level of knowing it is working every time I turn the key on. I discovered mine had failed when flushing the motor without the water faucet turned on.