The two Sliding door can't lock by using key and also automatically button

SOURCE: 2006 town and country passanger sliding door problem

I've leased two Town and Country vans over the past 4 years, and actually purchased the latest one after the lease. In both vans the sliding doors, normally the drivers side, reacted teh same way. If the door was closed it would open, stop a one point, and then return to the open position. At times I could get it close. But over time the doors stoped working all together.

It is not due to the switch or the motor. Most cases like this (in in both of mine) it is due to the repetitive use of that door, and the realitive inflexibility of the wire harness. Over time, and with more uses (in my case the driver side sliding door was used alot) the wire in the harness fails. Picture it as a willow branch. One snapped off of a tree it first is green and flexible, and bends pretty well into any form. But over time, with age and repetitive bending, it will break.

The only recourse is a new harness, as the wire/wires are broken somewhere in the harness (the belt chain in the lower track of the door). I was temped to take it apart and try to repair it myself, but as the parts were under warranty (I have the extended 85,000 mile), I opted to have the professionals handle it. The repair without the warranty is under $200 typically (parts and labor). Good luck.

SOURCE: Ford F150 Pickup 2005 power doors unlock but will not lock

I had almost the identical problem on my 2005 F150 FX4 Extended cab last weekend. The power door locks would not lock using the keypad, remotes, or door buttons. Almost all other functions worked correctly. The doors unlocked, the radio delay functioned, and the interior lights dimmed. When I used the remote the horn would beep twice indicating that a door was open even there was no message on the message center that a door was open. When I used the keypad or remote, I could hear a soft click from behind the seat. I think it was coming from the body security module or body security module - whatever Ford is calling it this year. I pulled the fuse for the Power Door Locks(BSM). As I removed it, I heard a soft click - sort of like a relay resetting. It may have come from the VSM/BSM. It may have possibly been a stuck actuator releasing. I don't think so. It wasn't that load. In any case, everything is functioning correctly now.

Tracy

SOURCE: Automatic door locks will not work.

you need to take it to the dealer and have them check the bcm for codes.... also have them check to be sure you have the latest software in the bcm.. its possible that you just need a software update... there are several TSB's covering the concern you have..... it can be a very simple fix with software or even a stuck lock switch may need to be replaced... without the proper diagnostic codes being read from the bcm all that can be done is guessing..and that can be expensive...

SOURCE: 2005 Pontiac SV6 Montana key fob unlocks doors but will not lock

For the sliding doors you need to clean the contacts, there are 6 or 8 on both sides, just wipe them clean as they are probably covered in oil/grease/grime.

SOURCE: sliding door does not lock with button on front

Your question is alittle vague,...so Ill do my best...If your van has central locking (all the doors lock when you lock the drivers door with a key) then I can easily say that the actuator for the sliding door lock has malfunctioned....However if you are implying that you cant lock the sliding door from the outside using a key then it is because the linkage inside the door has came apart (Both issues would cause the door not to lock with the power lock button) If it is the linkage this is easily fixed by removing the interior panel on the slider and reconnecting the metal rod to its rightful place, if it is the actuator you have to replace it by removing the interior panel..Good luck