Door will not lock after I installed a new battery.

how long was the battery out of the vehicle? some vehicles require reprogramming if the battery power is off the vehicle for a period of time. Might want to check with a parts man at your dealership. They sometimes give you free information. they know their fords because they sometimes they sell a lot of the same parts.

Go to online store reliable they have repair manuals I am sure you will get the solution. Here's the link
Best Manuals

I recently called the Volkswagen Dealership and spoke with the service manager about why my passenger doors no longer unlock using either of my two remotes...but all doors do unlock using the key in the exterior door lock, and by using the driver door master control switch. Note: The remotes are new, have been programmed by the dealership, and have fresh batteries in them. The VW service manager said "it sounds like the control module has a bad circuit". The fix would be a new control module, parts and 2 hours labor would be about $530.00. I mentioned that my original car battery is over eight years old and weak and needs to be replaced, and asked if that could be the problem. He said "NO that a weak battery wouldn't cause only that one single lock malfunction".

My husband went to the local auto parts store today and purchased a new battery for the car and installed it himself. Cost was just under $190.00 w/tax for the battery, but we purchased the top of the line "Interstate" battery. THIS FIXED THE PROBLEM! The remote problem is gone! All doors will lock and unlock as they did when the car was new! I'm happy to share the good news with everyone out there who may be experiencing the same problem. If your battery could be weak, try replacing it first before spending money on a new module. Cheers!

If you have a keyless remote, use it to lock and unlock your doors-if not, lock your door with the door lock, close the door, and unlock the door with the key. This should reset the alarm.

Toyota Corolla 1988-1997 Repair Guide Door Locks - REMOVAL & INSTALLATION
(see Figure 1)

1. Disconnect the negative battery cable.
2. Remove the door panel and watershield. Remove the service hole cover.
3. Disconnect the door outside opening linkage. Remove the two mounting bolts and remove the door handle if in need of replacement.

Fig. 1: Power door lock control system component locations

1. Disconnect the lock cylinder control linkage.
2. Remove the lock knob and the child protector lock lever knob.
3. Remove the lock assembly retaining screws and remove the door lock. If equipped with power locks, disconnect the electrical harness.
4. To remove the lock cylinder, remove the lock cylinder retaining clip and pull the cylinder from the door.

To install:

1. Coat all the door lock sliding surfaces with multi-purpose grease.
2. Install the outside handle with the two retaining bolts, if removed.
3. Install the door lock solenoid linkage to the door lock.
4. Connect the link to the outside handle.
5. Install the lock knob and the child protector lock lever knob.
6. Install the door opening control link tighten the mounting bolts to 48 inch lbs. (5 Nm).
7. Install the door lock cylinder control linkage.
8. Install the door panel and watershield.
9. Reconnect the negative battery cable.

Hope help with this; remember rated this post and thank you for using Fixya.

TRY A NEW BATTERY IN UR KEYLESS REMOTE

there is a little screw in back ,remove then install a coin or small screw driver in the middle and snap on unit, remove battery keep in mind which way battery sit in at, then install new one, and put back together,no programing needed should work if a battery is the problem good luck, hope this helps.

please rate as solved if this is what you need. You will need to borrow a heavy duty riveter from autozone or wherever you buy the lock cylinder from.


Removal

1. NOTE: The rear door window glass must be completely raised.
   Disconnect the battery ground cable. For additional information, refer to Section 414-01 .

1. Remove the rear door trim panel. For additional information, refer to Section 501-05 .

Trim Panel —Rear Door, Expedition Removal

1. Remove the power window switchplate (14524).

1. Disconnect the electrical connector.

1. Remove the rear door handle trim cover.

1. Remove the rear inside door handle.
   • Remove the door handle bolt.

1. Remove the rear door trim panel screws at bottom of panel.

1. CAUTION: To avoid damage to the rear door trim panel, do not pull directly outward.
   Lift upward and then outward to remove the rear door trim panel (27406).

1. Remove the rear door watershield.

1. Disconnect the power door lock actuator electrical connector.

1. Drill out the power door lock actuator rivet.

1. Remove and discard the screws.

1. Remove the power door lock actuator.
   • Disconnect the power door lock actuator rod.

Installation

1. NOTE: Use new screws when installing the rear door latch.
   To install, reverse the removal procedure.
   • Use Heavy Duty Riveter to install the new rivet.

I recently replaced the battery on my 2004 Toyota Camry. When I installed new battery the door locks will not stay unlocked once opened with remote. How do I reprogram?

First dissconect the battery and try to turn door key with no voltage applied to vehicle. This will ensure it is not a damaged key. If door locks turn, reconnect battery. Hopefully during disconnect your electronic door locks de-energized. If keys don't work with battery disconnected then the fault doesn't have to do with your battery or electric locks at all. If they work with a disconnected battery and not with it connected you are have an electrical short, either in a switch it's self or the wiring to the door lock switches. In this case I recommend taking the vehicle to a shop for repairs, electrical can get in depth without proper tools and diagrams