For some reason, I can't lock the doors by the drivers side lock switch unless I have the power windows "locked out" as well.

The remote works with the window lockout in either position, the problem only exists with the switch mounted on the door panel.

Any ideas?

in these type of cases its most likely the switch thats gone. you will probably have to replace it. find one at a junkyard, a switch of any 200sx will do, as long as its the power windows and door locks one. of course it could be something else, maybe someone else can fill you in.

Do you have any kind of aftermarket alarm or keyless entry??:confused: