You can buy new locks and replace them in the door they cost about 15 dollars a set if you do it your self but you can pull the door panel inside off and chect to see if the rod that connects to the lock is still connected.
First remove the Door panel on the vehicle and make sure any of the lock or handle rods are not broken or diaconected. Secondly if that's not the problem you may have a broken door latch. Price...
It depends on what kind of car you have! This may sound like a dumb question, but are you sure you have the right key? If you are, there are a couple of option. If that key doesn't work in any of the...
You should be able to find a shop manual at your local library with the right info...make copies as they are usually only in the REFERENCE section....good luck:)
The first thing is to lubricate the keyhole with something like WD40 or a liquid base graphite solution usually available at home depot or auto part stores. If that does not work,you need to get the...