Are you sure the problem with your door locks is the switch? On my '05 Ford F150, I have an intermittent problem with several of the door power door locks not working. It turns out the problem isn't the switch, but an actuator that controls the lock. What what I've learned, this is a common problem on Fords. They can be repaired, but the repair isn't 100% certain to work and it often won't hold up for very long.
As an aside, the intermittency of the problem is really interesting; two of my locks were occasionally failing to work last Fall. Since it's been cold, however, they've worked fine. I don't think this behavior is unusual for actuators going bad, but it's interesting that they've been working flawlessly all winter.
