Electric trim fail

[Wheels]

Hi,
My Model IV trim motor stopped moving in the down position one day a while back. I held the trim button down hard for a moment and it actuated the trim tab. So I think it is the switch. I read about the motor failing with excessive grease contaminating motor electrical, but I'm starting here. Do I need to disassemble this switch wiring to clean contacts? Are these things soldered into the chinaman hat switch? Ideas? comments?
Thank you in advance.