First you need to removed the plastic cover from inside the car staring from the top around the window and then the bottom part then removed the nuts from inside the latch.
blowtorch and chainsaw
get the instrution book
You need to removed the plastic cover on the inside and manually un-lock the latch. There is no easy way. The dealer want $270 to $290 if they do it.
Get a new door, or retainer latch.
The ajar switch is part of the latch, inside the door.
The door ajar switch is part of the latch inside the door.
it is possible that the rear door on a 2002 Sequoia won't open properly because the latch got rusted shut. Try some Liquid Wrench or WD-40 in the lock mechanism and around the seal and entire door.
Replace the door latch.
If the door latch on a 1999 Chevrolet Blazer is broken on the car frame, a new latch might have to be welded in. The old door latch will have to be cut out with a torch. If the latch is broken on the door, a new door might be cheaper than welding in a new latch.
the same way u change the driver side
You have to take the inside door trim out of the door, then there will be some bolts on the inside of the door remove the nuts and your door latch will come out.
what is wrong with the door latch? will it not open/latch? what year is the vehicle? all of these are needed to answer your question.