try looking on the door jams of the back doors themselves. it is there on my caddy.
Check the drivers side switch panel for the switch that locks out the passenger windows from working, make sure it is not on.
are they the factory locks?? if so it could bea vaccum line it operates on vaccum lines. or it could be the ground.
If you are having problems with interior door locks on a Ford around that year it is most likely the door lock actuators. There is one on each door. They are very prone to fail on those vehicles. On several occasions I have had to replace every single door actuator on Fords of that age. The actuator is behind the door panel, and fairly easy to access once the panel is off. I don't believe door lock actuators are very expensive for that vehicle, but you may want to have a repair shop verify that is the problem.
They make keys, change locks, and that sort of thing.
The fourth fuse in the interior fuse panel controls the power windows and locks on 2000-2001 Grand Prix. 25 amp silver fuse.
you might have the child safety locks activated
Automatic door locks engage on the 2003 Ford Explorer for safety.
It tells you how in the owners Manual. You can obtain one from the Dealer.
2009 CTS V Cadillacs do have child safety locks as well as other safety features. Though the child locks are the standard issue, most of their other features are more recent.
Rear Door Child Safety Locks (Sedan and Wagon models only) Child safetly locks are located on the rear edge of each rear door. To activate the locks, you must insert your car key into the opening and turn to the locked "vertical" position. To disengage the child safety lock, insert your car key and turn to the center position.
Safety features on the Buick Rendevous include airbags, anti-lock breaks and child safety locks. The child seats also have air bags.
A little switch on the door
DID YOU CHECK CHILD SAFETY LOCKS ON DOOR
When you open the doors there is a lever on the door itself that you can switch up or down depending on if you want to engage or disengage the child safety locks. There should be a sticker indicating which way to lock-unlock.
The child safety locks may be in the lock position.
Lots of techniques are available. Mostly magnetic locks are in use for cabinets. You can use child lock also if you want.
Childproof cupboard locks are an important aspect of keeping small children safe. Locks from Mothercare are highly rated, as are Kidco and Mommy's helper in the US.