Buzzer won’t Stop

[Rgobell]

I have a 1991 90 hp Mercury 2 stroke motor. The engine warning buzzer went off on my recent use of the motor so I quickly and slowly headed home. I‘m having an issue with diagnosing the reason for the alarm.

In an effort to diagnose the problem I’ve disconnected both the oil level switch and the head temperature switch but the buzzer continues when the key is turned on. What else would be causing the alarm. What else should I be looking for.

I sincerely appreciate any help!

 

[Dukedog]

disconnect tha purple going to tha oiler warnin' module..................

 

[racerone]

Defective buzzer ??

 

[Dukedog]

Defective buzzer ??

could be if it continues after he disconnects tha purple feed to tha module....

 

[Rgobell]

Thanks guys. I believe I’ve disconnected all the purple wires (see attached) but still have the warning buzzer?

 

[flyingscott]

Disconnect the oil tank sensor. Those are notorious for failing.

 

[Rgobell]

The oil sensor is already disconnected.

 

[racerone]

Is the buzzer defective ?

 

[Rgobell]

I’ve ordered a new oil warning module to see if that takes care of. I’ll update after installed.

 

[Rgobell]

I’ve ordered a new oil warning module to see if that takes care of. I’ll update after installed.

I installed the new (used) warning module. Problem fixed.