Yamaha Dual Control Keyswitch Buzzer died

[SouthernSailor]

I have a nearly new Yamaha dual keyswitch part number 6K1-82570-08-00 (non command link)

For some reason the starboard engine buzzer just stopped working completely.

The port buzzer is fine, but the starboard one doesn't make a sound when the key switch is turned on anymore. Otherwise the keyswitch appears to be working normally.

Is there a wiring diagram/schematic for this keyswitch and the connection to the engine?

Any troubleshooting tips would be appreciated.

Thanks

[seahorse5]

Most of the time, removal of the keyswitch assembly and the replacement of a an inoperative warning horn is pretty straightforward for the mechanically inclined person.

[SouthernSailor]

Replacing the buzzer if it is defective appears to be pretty easy.

However it is prudent to see if the buzzer is dead before ordering and installing a replacement.

That's why I asked for a schematic and diagnostic information. To answer questions such as:

- What DC voltage drives the buzzer?

- What circuit actuates the buzzer? Is the buzzer con*****ed directly from the engine or is it con*****ed via some electronics in the encapsulated package at the rear of the keyswitch?

- Could the problem be at the motor end of the circuit?

I do not intend to replace parts without figuring out what's actually wrong first.

If anyone has a schematic and parts list for the non-command link dual key switch that would be helpful.

Or diagnostic hints from anyone who has encountered this symptom in the past.

Thanks

[rodbolt17]

its a stupid simple 12v dc buzzer.
at key on power,if rigged correctly, the DES switch provides the ground for a key on power test.
after that the pink wire provides the ground path.
a quick test for V4 and larger US market engines?
simply pull the stop lanyard and crank the engine.
if V4 and larger engines get a crank signal and a stop signal at the same time the ECU sets the alarm.
but, its a simple two wire buzzer.
yellow is key on 12V+, pink sets the ground path via the ECU.

[SouthernSailor]

Thanks Rodbolt17....EXACTLY the information I was seeking!

Cheers!!!

[rodbolt17]

trust me.
it looks crazy but its actually simple.
no worries.