2009 STS drivers door sensor seems to be inoperative. The cab light does not come on when this door opens all other doors work. Also the steering wheel Auto Up on Exit does not work

I could see one window not working from a broken wire inside the door flex , but not both back windows . Back windows are controlled by LF door module . Both back windows have different grounds - LR G200 an RR G201 . Also both rear window switches have different power supply's .RR switch fuse # 18 30 amp . LR is fuse b# 9 40 amp . Both window motors or switche's going out at same time ???? wouldn't think so .

• Driver door module circuits open/shorted.
• Loose, corroded connectors.
• Damaged window regulator control switch.
• Damaged window regulator electric drive.
• Open fuse in fuse junction panel Fuse 39 (10A), 28 (10A), 30 (10A).
• Open fuse in power distribution box Fuse 9 (40A), 10 (40A), 8 (40A).
• Glass, Frames and Mechanisms
  
  Inspection and Verification
  
  1. Verify the customer's concern by operating the power windows/heated back window to duplicate the condition.
  1. Inspect to determine if one of the following mechanical or electrical concerns apply:
     
     
     VISUAL INSPECTION CHART Mechanical Electrical
     • Front door power window regulator damaged.
     • Front window run damaged.
     • Front door window glass out of window run.
     • Front door window glass broken.
     • Driver door module circuits open/shorted.
     • Loose, corroded connectors.
     • Damaged window regulator control switch.
     • Damaged window regulator electric drive.
     • Open fuse in fuse junction panel Fuse 39 (10A), 28 (10A), 30 (10A).
     • Open fuse in power distribution box Fuse 9 (40A), 10 (40A), 8 (40A).
     • Scratched grid.
  1. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
  1. If the concern remains after inspection, connect the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent to the data link connector (DLC) located beneath the instrument panel to perform DATA LINK DIAGNOSTICS test. If the NGS responds with NO RESPONSE/NOT EQUIPPED for the driver door module, go to Pinpoint Test A . If the NGS responds with NO RESPONSE/NOT EQUIPPED for the lighting control module, go to Pinpoint Test B . If the DATA LINK DIAGNOSTICS test is passed for the drivers door module and lighting control module, retrieve continuous DTCs and execute Self Test Diagnostics for the driver door module and lighting control module to retrieve current DTCs.
  1. If self test is passed and no DTCs are retrieved, go to the Symptom Chart to continue diagnostics.
  1. If DTCs are retrieved, go to the Driver Door Module (DDM) Diagnostic Trouble Code (DTC) Index or Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics.
  1. If the driver door module cannot be accessed by the NGS, GO to Pinpoint Test A . If the lighting control module cannot be accessed by the NGS, go to Pinpoint Test B .
  Rotunda Service Bay Diagnostic System (SBDS®) 001-00001 may also be used to diagnose this system.
  
  • Power Windows Completely Inoperative
  • Supply open or shorted.
  • Ground open.
  • Window regulator control switch inoperative.
  • Circuits open or shorted.
  • Window regulator electric drive inoperative.
  • Driver door module.
  • PERFORM driver door module self test. Service DTCs. If no DTCs are retrieved, GO to Pinpoint Test C .
  • Single Power Window Inoperative
  • Window regulator electric drive circuits.
  • Window regulator electric drive.
  • Window regulator control switch circuits.
  • Window regulator control switch.
  • Driver door module.
  • GO to Pinpoint Test D .

private sale or from a used car lot if from lot call and advise should have a limited warranty ---if private call and ask about non start --try to get vehicle scanned and check for any codes previous may have cleared codes to make sale --check fuses/relays -if have starter fluid give shot if starts check fuel pump -possible fuel filter-if pump good will need to check ignition system ,check for spark,and or certain sensors like the crank position sensor------- the following post is from caddyinfo forum Subject: Multiple Electrical System Malfunctions, Engine Will Not Start, Engine Will Not Shutdown, IP Gauges/Lighting Inoperative, Radio Inoperative, HVAC Display Erratic, Loss of Rear Door Functions (Inspect Both Rear Door Harnesses and Repair, if Necessary)
Models: 2005 Cadillac STS
Built Between and Including VIN Breakpoints 50112423 and 50133076
Attention: This inspection should be performed on all vehicles currently in your inventory prior to sale or delivery.
--------------------------------------------------------------------------------
Condition
Some customers may comment on one or more of the following conditions:
• Engine Will Not Start
• Engine Will Not Shutdown
• IP Gauges/Lighting Inoperative
• Radio Inoperative
• HVAC Display Erratic
• Loss of Rear Door Window/Lock Functions
These conditions may occur intermittently.
Cause
These conditions may be caused from the rear door wiring harness being misrouted causing the harness to contact the metal door bracket. This contact may cause a rub through to the wires enclosed in that harness.
Correction
Inspect both rear door wiring harnesses. Repair any damaged wires and reroute harness to correct location. Use the procedure listed below.
Make sure the ignition is off.
Remove both the rear door trim panels. Refer to the Side Rear Door Trim Panel Replacement procedure in the Doors sub-section of the Service Manual (SI Document ID #1465575).
********
2005 STS electrical problem NO START

2009 Door Problems - MyG37

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Dec 11, 2009 - My wife went around to the drivers side and used her key to see if she

there is a switch on the drivers side dash left that dims or brightens all your dash lights it also turns on your cab light make sure the switch for your cab light is set to the right setting

Adjust seat and steering to comfortable position press set and 1 on drivers door,position will be put into memory. put seat and steering into position that it is easy to get out of car, press exit 1 and the exit position will be in memory. do same procedure for driver 2.

You should look at the regulator/motor assembly. Remove the door panel, find the connector for the motor and try to director power it or check for continuity. High resistance or an open will cause inop. Also check to see if the motor is even getting power to it when the switched are pressed.

Because the FOB is working the other two other things it can be are the fuses that control it, or the power lock control moduel. The fuses can be repaired easily, so I would attempt that first. The control moduel, however, I would take to a repair shop. Hope this helps! Please rate 4 thumbs up!

something came off inside your door,remove the panel and look for a plastic rod connector either off or broken.If it is off go get a new one their very cheap.
The other thing is the door lock actuator could be bad,you will know when you get inside,work the all the electric do dads and watch the motor react.

all the best with it mate

There is NOT a mechanical connection to the outside door handles on the front doors. There is an electronic "door popping solenoid" This is a electronic problem. I think there was a recall on this.