How does the electrical connector between the door and the body come apart

Everything you mention is in the same door. Look for a connector between the body and the actuators in the door. This may be accessible or just inside the door itself, past a rubber grommet. Pull the connector apart and inspect it. Spray with silicon or WD40 and reassemble.

you should be able to loosen screw to split the connection, if i think this is the type you have then the clips are used to keep bolt from falling out, you should be able to loosen and pull connector apart

There is a ground junction under the carpet just inside the driver's door. Pull the trim panel at the bottom of the door jam and pull the carpet back. There is a black plastic connector with several black wires going into it and bolted to the body. This connector get corroded over time and many circuits lose ground. Simply take that connector apart and clean it, or cut the wires off individually and install new ring terminals and install back on the body.
Happens all the time!

1. Remove the front door trim panel.
   

1. Position aside the front door watershield to gain access to the exterior rear view mirror control switch electrical connector.

4.Disconnect the exterior rear view mirror control switch electrical connector

as you see you have to remove the door panel to have access to the electrical connector in case that you dont know how to do it here are the instructions

NOTE: Left front door trim panel shown, right front door trim panel similar.

1. Remove the sail panel.
   
   • If equipped, disconnect the electrical connector
   
   
2. If equipped, lift up and remove the exterior rear view mirror control switch panel.
   • Disconnect the electrical connector.

1. If equipped, lift up and remove the window control switch panel.
   • Disconnect the electrical connector.

1. If equipped, remove the window regulator handle.
   1. Position the window regulator handle cover aside.
   1. Remove the window regulator handle screw and regulator handle

5.Remove the door trim panel center screw cover
6.Remove the 2 door trim panel center screws
7.Remove the 2 door trim panel lower screws

1. NOTICE: Do not pull directly outward on front door trim panel as damage will occur.
   Remove the front door trim panel.
   • Lift upward to remove the front door trim panel.

1. NOTICE: Insert the lower panel tabs first or they can break when installing the front door trim panel.
   To install, reverse the removal procedure

Hi and welcome to FixYa!

As a first course of action, I strongly suggest that you tighten the ground battery connector of the car. If the ground connector is secured and the problem still persists, please add another body ground. For example, putting an electrical cable from any part of the engine to the body. This is one example of body ground.

Hope you find this information helpful enough and thank you for using FixYa! Have a good one!

It is nearly 10 years old. While it is apart get a new regulator from a parts store or ebay so you are not taking it back apart next year. Those connectors can be had at stores which sell paint and body supplies for cars, and at auto glass shops. I would pay the glass shop to remove and replace the regulator and put the door back together.

Please don't forget to rate! Thank you!

Removal & Installation

The door-to-body mounting

Detach the door wiring from the connector

This is a two person operation.

1. Remove the two door check-to-body retaining screws.
   

WARNING

Cover the end of the check strap to prevent possible paint damage.

1. On the rear doors, remove the rear door trim panel, detach the electrical connectors from the components (if equipped) and remove the wiring harness from rear door.
   
2. On the driver's side front door, disconnect the window regulator wiring, if so equipped, by removing the wire connector cover, loosening the screw and separating the connector halves.
   
3. On the passenger side front door, remove the rubber harness protector from the body to reveal the electrical connectors. Detach the two electrical connectors.
   
4. If the door is to be replaced, transfer the following components to the new door if in usable condition:
   
   • Door trim panel
     
   • Watershield
     
   • Outside mouldings
     
   • Trim clips
     
   • Window regulator
     
   • Door latch components.
     
5. Remove the hinge retaining screws and nuts from the door and remove the door.
   

To install:

1. Position the door onto the hinges and hand tighten the screws.
   
2. Align the door and tighten the screws to 19-25 ft. lbs. (25-35 Nm).
   
3. If removed, install the wiring harness to the rear doors.
   
4. Attach the electrical connectors to the door panel.
   
5. Install the door panel(s).
   

// // 0) preLoad.src = ctl00_cphLeft_chRepairTreeNav_tvTOC_ImageArray[i]; } ctl00_cphLeft_chRepairTreeNav_tvTOC_Data.lastIndex = 31; ctl00_cphLeft_chRepairTreeNav_tvTOC_Data.populateLog = theForm.elements['ctl00_cphLeft_chRepairTreeNav_tvTOC_PopulateLog']; ctl00_cphLeft_chRepairTreeNav_tvTOC_Data.treeViewID = 'ctl00$cphLeft$chRepairTreeNav$tvTOC'; ctl00_cphLeft_chRepairTreeNav_tvTOC_Data.name = 'ctl00_cphLeft_chRepairTreeNav_tvTOC_Data'; //]]> var _strTreeScrollHidName = 'ctl00_hidTreeScrollPos';

Maybe these instructions will help you take the door apart: REMOVAL & INSTALLATION

1. Disconnect the negative battery cable.
2. Mark the location of the door hinges on the door.
3. Remove the door trim panel and water deflector.
4. Label and detach the electrical connections.
5. Remove the rubber conduit and the wiring harness from the door.
6. Support the door with a suitable jack, being careful not to damage the paint or trim.
7. Remove the bolts from the door side of the hinges and remove the door with the aid of an assistant. To install:
   
8. Position the door to the hinges with the aid of an assistant. Install the bolts.
9. Adjust the door for proper door-to-body alignment and lock-to-striker engagement, then tighten the bolts to 38 ft. lbs. (48 Nm).
10. Attach the wiring harness and rubber conduit to the door.
11. Attach the electrical connectors.
12. Install the water deflector and door trim panel.
13. Connect the negative battery cable. Fig. 1: Front door hinge1990—93 Deville and Fleetwood; others similar
    Fig. 2: Rear door hinge1990—93 Deville and Fleetwood; others similar
    

That is either bad contacts inside of the master window switch on the driver side door, and you can actually take apart those old switches and clean up the contacts with an emery board type finger nail file, or the problem will most likely be a broken wire(s) inside of the weather boot that runs between the driver side door and the body of the vehicle. Try turning the ignition to the "Run" position and then move the weather boot between the door and the body of the vehicle around while at the same time holding a window switch down in the direction that you want the window to move, and if the window does work while moving around the weather boot then there is a damaged wire(s) that will need to be repaired, and any wires that you find broken should be soldered back together and do not use wire connectors to repair the wires. (However, if the wires are too far apart inside of the weather boot then this test will not show any results) and if there is no damage to the wires at the wire connector to the master window switch, then the wires leading from the master window switch out through the door and the weather boot will have to be inspected thoroughly for any damaged wires.

ok,make sure you tried all the windows on all the door switches,,,,what i think you may find is broken wires,sounds like it,,,,,when you open the drviers side door,look in the crack where the body of the car meets the door and you will see a black wire harness,you are going to carefully cut open that harness loom with a sharp razor knife,Be careful not to cut yourself and not to cut into the wires inside the loom,,,once you got it cut open you will need to inspect the wires inside,,they get dry and brittle from all the opening and closing of the door and the wires chaff open and short and some even break apart,,ive seen 6 broken wires in 1 ion door jam,,,,all the wires for all the windos run thru here because of the master switch being in that door...,,if oyu do find broken ones go get the pinkish red **** connector,make sure they are heatshrink connectors so they are weather proof,fix all the wires and heat the connector up to shrink it tight then electrical tape over each connector seperately,then put loom back on and electrical tape the complete loom from door to body,,,,,and all should work...ive never seen a bad windows switch knock out all 4 windows so i doubt its that,,,but good luck,hopefully this helps you