Need help with drivers side seat adjustment...All positions work with the exception of the vertical up/down movement.. When I lift the horizontal button I hear the servo motor turning but the seat doesn't move...Has anybody had this happen? Do you know if one motor controls all seat positions or does each position have its own motor. It sounds like the motor is OK but just spins as if a shaft is broken or out of place...Are these motors easy to access and what do they cost?