Originally Posted by South of Heaven
Another observation...The button for my port bow thruster is kinda "iffy". It works but I have to press it at the right angle. If I press it straight on it doesn't work AND I hear a click.... The starboard side button is perfect. Ill check the port button on the bridge as well.
You could swap the two switches to see if the problem is the switch itself but from your description, I believe it is the switch.
In some cases, spraying electrical contact cleaner into the switch will correct the problem but the most reliable fix is to replace the switch.
If you try the contact cleaner fix, you have to be able to get the spray actually to the contacts themselves. On some switches you can do this. On some, you cannot.
I am not at my boat now, but if memory serves, that switch might be the same as your horn switch. If so, you could swap out the horn switch and just buy a new horn switch without having to have a perfect physical match.