2003 Ford Taurus, drives door will not open. Removed the inside door panel I observed the door lock hardware was disconnected. Can't see where it hooks back up. Is there a YouTube to show me. Thanks

Your door post maybe loose and now the ground is breaking causing the light to come on/off from vibration check all 4 door post for tightness and proper closure of the doors easy check out the windows down and push/pull on the doors while observing the interior light for the flickering also there are wires that plug into all 4 door locks inside the door at the latching mechanisms one of them maybe loose on the lock or the wire maybe breaking or a corroded plug connection in one of the doors those are the causes of this problem and are listed in ease of repairs first ok good luck Stephen

More info needed. Is this a front door or a rear door? If a front door, you need to remove the plastic interior trim panel for access. With the interior panel removed, temporarily reinstall the window switch to raise the window glass. Look inside the door at the lower rear corner. You will see the lock actuator there. It's mounted on a steel U shaped bracket. It has a black rubber boot over it and a rod going up to the door latch. You may need to remove the bolt holding the steel U channel which guides the rear of the window, for improved access to the lock actuator. Unsnap the retaining clip for that rod at the latch mechanism. The U shaped bracket is riveted into the door frame. You will need a 3/16" or 1/4" cobalt drill bit [available at Ace Hardware] to drill out the retaining rivet(s). Partially remove the actuator for better access to the electrical connector. Disconnect the electrical connector and remove the actuator. Reverse this process to install the new actuator. You can use a Nyloc nut, washers and a bolt to mount the new actuator if you don't have a rivet gun and the proper sized rivet(s) to remount the new actuator.

Every wire going into the door will have a connector inside the door that must be disconnected (windows, locks, mirror, etc.) Pull off the inner door panel and disconnect all the wires where they connect to a switch or a controller. Then push the wire harness back out the door opening where the wires go in. Now you can continue with replacing the door

it is a defective door lock actuator in the door you will have to take it in and have it replaced unless you are able to. the it is inside of the door, and the panel will have to be removed

using a test light with all doors closed everything in the car off; disconnect your black battery cable then: connect a test light between the battery post you just removed the cable from and the cable you removed; the light should light. this is your short (leak) then remove fuses until you find the fuse that causes the light to go off your problem is in that circuit.

Tailgate latch, handle and lock

• Open the tailgate.
• Remove the two bolts and detach the door stop.
• Lower the tailgate and remove the tailgate access cover.
• Disconnect the control rods.
• Detach the retaining nuts and remove the handle and lock cylinder assembly from the tailgate.

...
Door trim panels

• Disconnect the cable(s) from the negative battery terminal(s).
• On manual window equipped models, pull the window crank cover aside, remove the screw and detach the handle.
• On the front door of power window equipped models Pry up on the retaining clip at the front edge of the armrest and lift the armrest switch control plate out and disconnect the electrical connections,then remove the retaining bolt from the opening.
• Use a small screwdriver to pry off the courtesy light cover for access to the trim panel retaining bolt.
• Carefully pry off the mirror trim panel from above the front edge of the door panel.
• Once all of the bolts are removed, remove the trim panel by gently pullingit up and out .Detach the courtesy light bulb housing from the panel.
• For access to the inner door components, remove the speaker (if it would interfere with watershield removal) and the screws from the trim piece at the lower trailing corner of the door, then carefully peel the watershield from the door.
• Remove the screws securing the latch.
• Working through the large access hole, position the latch as necessary to disconnect the electrical connector and disengage the outside door handle and outside lock cylinder to latch rods and the inside handle-to-Iatch cable.
• Detach the locking rods by unsnapping The remaining outside handle retaining nut can be reached through the access hole in the door frame and the upper striker the portionof the plastic clip engaging the connecting rod, then pulling the rod out of its locating hole.
• Position the latch as necessary to disengage the door lock actuator hook. Detach the cable cover and disconnect the cable from the latch. Remove the latch assembly from the door.

It sounds as if the lock solenoids are either very dirty, worn or some of both. I'd open up one of the door panels and locate the locking solenoid. Possibly clean it out with WD40 or such. If problem does persist you'll need to change the solenoids out (if this is the case I'd look for good units off a wreck, save youself a dollar or two)
I hope this may have helped,
Tom

you either need a motor or motor and window regulator assembly.
SECTION 501-05: Interior Trim and Ornamentation 2002 Taurus/Sable Workshop Manual
REMOVAL AND INSTALLATION Front Door Trim Panel Removal and Installation

1. Disconnect the battery ground cable. For additional information, refer to Section 414-01 .

1. Remove the front door trim panel screws.

1. NOTE: To release the door trim panel two part pin-type retainers, first pull outward on the bottom of the door trim panel.
   Remove the front door trim panel.
   • Disconnect the electrical connectors.

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SECTION 501-11: Glass, Frames and Mechanisms 2002 Taurus/Sable Workshop Manual
REMOVAL AND INSTALLATION Front Door Window Regulator And Motor
Special Tool(s) Heavy Duty Riveter
501-D011 (D80L-23200-A) or equivalent
Removal and Installation

1. Remove the front door window glass. For additional information, refer to Front Door Window Glass in this section.

1. Disconnect the front door window regulator motor electrical connector.

1. Remove the window regulator rivets.

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SECTION 501-11: Glass, Frames and Mechanisms 2002 Taurus/Sable Workshop Manual
REMOVAL AND INSTALLATION Door Window Regulator Motor Removal and Installation

1. Close the window.

1. Disconnect the battery ground cable. For additional information, refer to Section 414-01 .

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

1. If equipped, remove the radio speaker.

1. Position the watershield aside.

1. Disconnect the door window regulator motor electrical connector.

1. Remove the bolts and the door window regulator motor.

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Mine did this. I went around to each door and sprayed a liberal amount of WD-40 in the latch, then open and closed each door about five times. It hasn't done it since. I think the switch inside was not moving freely.

The electric motor that pulls the lock button up and down has failed, you will need to pull the door panel to replace it. Yes it is fairly common.