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Posted on Jan 02, 2017
SOURCE: 99 Ford explorer Door Lock
OK. Now I have come across this myself and have done the following to fix it. First you need to know if the power door lock actuator is bad or not. If the driver door locks and unlocks with the inner driver door main control switch then it is not bad. If not then try to replace this component. To do this you will need to remove the door panel. It is not that hard. Many tutorials online that can help with this. It is easier then you think. Pull back the inner water seal from the door frame to gain access to the inner working of the door. You will need to remove the window track that is in front of the actuator to remove it easily. If not then you will have a very hard time trying to figure out how to get it out. There is a bolt that hold the bottom half on that needs to be removed. It comes out and re installs very easily. Disconnect the wiring from the actuator before you try to remove it. You will need to remove the rivet located on the outside of the door that holds the actuator in place. Drill this one out. This needs to be removed so the old actuator can be removed and you can install a new one. This rivet is heavy duty is going to be 1/4" You must not use a nut an bolt or a plastic rivet to reinstall the new actuator for the nut an bolt can come loose and cause failure and the plastic one can break very easily due to the power that is exerted by the actuator. You will have to get a heavy duty rivet gun for this as well for the standard ones are too small. They can be had at Harbor Freight for like $20.00 and comes with all the different size rivets too. To re install the new actuator just reverse the process. If this does not fix it then the problem lies with the door cylinder contact switch. This switch is mounted on the Keyed door cylinder and is connected to the power door lock actuator. It sends a signal to the actuator to lock or unlock when you turn the key. It also controls all the the other doors as well. I am not certain how much this is but I do know it can be purchased at most auto parts stores. I have also found that the door latch receiver mechanism can go bad too. The key will lock the driver side door but wont unlock the driver side door. The only way to open the door was to go to the other side or the rear driver side and use the inner door lever. This can be a costly fix and is not easy to replace by yourself. It is very difficult to remove and can be a lengthy job at that if you are not to familiar with these types of assemblies. If you are not careful you can also break the inner door handle by pulling too hard and that is not cheap to replace either. If you do not want to try to do this yourself then let someone who knows how to do it do it for you. It can be a very aggravating job if you are not used to it. If your key is not turning in either direction on any of the locks then the tumblers are jammed and need to be lubed up to operate properly. This is very easy to do and won't take much time. To remove the key lock from the door you need to remove the lock ring on the cylinder to disengage the door lock mechanism and then pull the flex plate that holds the lock in the door. After that insert your key to see if the tumbler slides are moving freely. If not then spray it with an all purpose oil or grease so you can loosen up the tumblers slides. They should be visible on the underside of the lock. Work the key in an out slowly till you see all the slides move easily and watch to make sure that they go back in to place when you remove the key. That's all there is to it. If any of the tumbler slides are damaged then you need to take it to a lock smith and have him replace the bad slides. Should not cost that much and will save you some money as well instead of paying for a new keyed lock which will also change your key to that door and will not work in the other ones. Hope this helps
Posted on Jan 04, 2009
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