as per the maint manual i just replaced an intermittently working buzzer, but i want to try to overhaul the old one for a backup, has anyone out there done this?? here is what was wrong : when hooked up to a 12v batt, it just made a clicking contact noise until you smacked it and then it would beep normal for a few tries, then back to clicking again, etc...it looks like it is all factory sealed up and no easy way inside to the gizzards to take a look see??? thanx