'02 convertible power door lock problem.
 

Hi, the power door lock on my connvertibledrivers side makes a loud bussing sound when you try to lock or unlock door with remote or key. It's also hard to turn the key when used. From my electronic days, it sound like a solinod that's not pulling in correctly. When driving, the auto lock funtion activates and the same buzzing sound lasts for 1 or two secounds. Any ideas? Is it the door lock mechanism? Look like it may be a bear to get at and replace. Thanks.