Now the front, PASSENGER side door lock activates all four locks.

But the driver's side won't affect the passenger side lock and neither will the key. Seems like some kind of sequence proglem.

What in the Sam Hill did I do to cause that?

It has to be a DAO problem: DumbAssOperater

Now I think it's a solenoid in the passenger door.

So, we're just gonna LIVE with it.