The Blue push-button to actuate the mirrors gradually became stiff to operate and now won't actuate the mirrors at all. The mirrors can be opened & closed by hand, (but the wind closes them!). I have split the switch housing & applied contact cleaner to no avail. I hear no indication that a relay operates even when I do manage to depress the button. Where is the relay located? Is there a separate fuse for the mirrors? Where can/should I obtain a replacement switch (without replacing the whole assembly? Any helpful comments or advice welcomed.