If you're referring to the large round plug on the circuit board, yes, I'd pull that to do a continuity or resistance test. Just spray it good with penetrating oil first and gently pull it straight out....don't pull sideways to get it loose or you might loosen the circuit board pins. If you're careful where you pry, using two flat blade screw drivers (one on each side), works well. Just be careful you don't cut a copper trace on the board.