Can't close rear window sunshade - 2004 Cadillac DeVille DTS

Is there anything else to check before changing the motors ? Yeah , hook up a factory or some other type of professional scanner an check for DTC'S - diagnostic trouble codes,also to see if the scanner will communicate with the modules. Changing batterys without a alternate power supply can cause modules to go to sleep permanently.

Battery Disconnect Problems (aa1car.com)

Power Sunroof System Components
The Power Sunroof and Sunshade System consists of the following components:
• Sunroof control module
• Sunshade control module
• Sunroof switch
• Sunshade switch
• Rail and track assembly upon which the sunroof and sunshade glass rides
• S/ROOF/SUNSHADE Fuse 30 A
• Body control module (BCM)


Don't be a parts changer, learn how to diagnose! So before you go wasting your money on parts not needed see if a professional scanner can communicate with all the modules on the vehicle.

The Power Sunroof System will operate only with the ignition turned to the RUN or Accessory positions, this allows for retained accessory power (RAP) control of the sunroof and sunshade through the body control module (BCM). With the ignition in the run or accessory positions, the BCM supplies the sunroof and sunshade control modules with ignition voltage which allows sunroof and sunshade operation. Once the ignition switch is turned to OFF the sunroof will continue to operate until any door is opened or when the RAP timer reaches its shut-off limit. For a description and operation of the RAP operation, refer to Retained Accessory Power (RAP) Description and Operation.


Circuit/System Description
The sunroof and sunroof shade modules supply each of the switch signal circuits with a 12-volt reference. When a switch is pressed the signal circuit is pulled low signaling the sunroof or sunroof shade open or close request. The modules determine the motor direction based on inputs received from the sunroof switches. When the modules reverse the polarity of the applied voltage, the motors reverse direction. The sunroof shade module contains the logic for opening and closing the sunshade based on Serial Data from the sunroof control module. Ignition voltage is supplied to the sunroof and sunroof shade modules by the BCM. B+ is applied to the sunroof and sunroof shade modules via the S/ROOF fuse.
The sunroof shade module contains the logic for opening and closing the sunshade based on Serial Data from the sunroof control module. The sunroof shade module internally applies voltage and ground to the appropriate circuits of the reversible sunshade motor in order to move the sunshade panel to the open or closed positions.

https://www.google.com/search?q=Manually+close+mercedes+c300+sunshade

videos

Power Sunroof System Components
The power sunroof system consists of the following components:
• One tilting glass sunroof panel--For sunroof vent functions
• Three sliding glass sunroof panels, which allow the sunroof to open in sections
• Power sunshade panel--An adaptable panel which is rolled out or rolled in and stored by the sunshade motor/actuator in order to cover or uncover the sunroof glass panels
• Power sunroof switch--A rotary style switch controlling sunroof switch signal inputs to the sunroof motor/actuator
• Power sunshade switch--A momentary press style switch controlling sunshade switch signal inputs to the sunshade motor/actuator
• Power sunroof motor/actuator--Comprised of both the sunroof motor/actuator and the sunroof electronic control module, it is sometimes referred to as the sunroof control module/motor assembly.
• Power sunshade motor/actuator--Comprised of both the sunshade motor/actuator and the sunshade electronic control module, it is sometimes referred to as the sunroof slave module.
Sunroof Motor/Actuator and Sunroof Switch
The sunroof motor/actuator assembly is located at the rear of the passenger compartment, above the rear view window, between the headliner and the roof structure. The sunroof motor/actuator assembly also contains the sunroof electronic control module and the two components are serviced together as a unit.
Battery positive voltage is supplied to the motor/actuator at all times through the 25-amp LAMELLA ROOF fuse located in the rear fuse block. Whenever the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the motor/actuator is also supplied battery positive voltage through the accessory voltage circuit and the 10-amp ROOF/HEAT SEAT fuse which is located in the body control module (BCM). The sunroof motor/actuator is grounded through splice S403 to body ground G302.
The sunroof motor/actuator supplies voltage to the sunroof switch through three internal resistors and three hard wire circuits. The 3 hard wire circuits are:
• Sunroof switch data 1 signal circuit
• Sunroof switch data 2 signal circuit
• Sunroof switch data 3 signal circuit
The sunroof switch, which is also grounded to G302, is a rotary style switch. When the switch control lever is turned in a rotational direction, the appropriate switch contacts and signal circuits for the selected mode are simultaneously opened and/or closed to ground in order to provide the appropriate combination of voltage signals to the sunroof motor/actuator. The sunroof motor/actuator interprets the signals, and then applies battery positive voltage and ground to the appropriate circuits of the integral power sunroof motor in order to move the sunroof glass panels. At the same time, the sunroof motor/actuator sends a serial data message, via the keyword 2000 serial data circuit, to the sunshade motor/actuator to open the sunshade panel in conjunction with the sunroof glass. As the sunroof glass panels slide rearward to the open position, the sunshade motor/actuator simultaneously rolls in the adaptable sunshade panel.
The sunroof switch is mounted in a bezel which is located above the rearview mirror.


Circuit/System Description
The sunroof system is controlled by the sunroof switch and the sunroof control module/motor assembly, which is also known as the motor/actuator assembly.
The sunroof control module is supplied battery positive voltage at all times through the 15A SUNROOF fuse located in the rear fuse block. Whenever the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the module is also supplied voltage through the accessory voltage circuit and the 10-amp ROOF/HEAT SEAT fuse located in the body control module (BCM). The sunroof control module is grounded through the ground circuit at G302.
The sunroof control module supplies voltage to the contacts of the sunroof switch through the sunroof switch close signal circuit and the sunroof switch open signal circuit. The sunroof control module also supplies ground to the switch contacts through the sunroof switch low reference circuit. When the switch is operated, the contacts and signal circuit for the selected mode are closed to ground, the voltage is pulled low in the module, and the appropriate signal is recognized by the control module. The control module then internally applies battery positive voltage and ground to the appropriate circuits of the reversible power sunroof motor in order to move the sunroof glass panel to the open, close, or vent


Do you know how to do electrical testing ?
Circuit/System Testing
Ignition OFF, disconnect the harness connector at the sunroof control module.
Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 1 and ground.
? If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 3 and ground.
? If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminal 6 and ground.
? If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
Connect the harness connector at the sunroof control module.
Ignition OFF, disconnect the harness connector at the sunroof switch.
Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal B and ground.
? If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.
Ignition ON, test for B+ between the signal circuit terminal C and ground.
? If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.
Test for B+ between the signal circuit terminal A and ground.
? If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the sunroof control module.
If all circuits test normal, test or replace the sunroof switch.

Important: This sunroof system is timed from the factory in order to allow the actuator to shut off automatically when the sunroof window reaches a certain position. Use extreme care when removing the actuator from the sunroof module. This may cause the timing to be thrown off. This may damage to the sunroof. Anytime the actuator needs to be removed from the module, ensure that the sunroof window is in the fully closed position.
Remove the sunroof window. Refer to Sunroof Glass Panel Replacement .
Slide the sunshade fully rearward. Move the sunroof window to the vent position. Remove the sunroof screws (two on each side). Remove the sunroof window from the module.
Place the sunroof module in the fully closed position. Remove the headliner. Refer to Headlining Trim Panel Replacement in Interior trim.
Tools Required ?€¢
J 38778 Door Trim Pad and Garnish Clip Remover

?€¢
J 2772-C Headliner Installer

1. Remove the sunshades. Refer to Sunshade Replacement .
2. Remove the overhead console, if equipped. Refer to Roof Console Replacement .
3. Remove the sunshade retainers. Refer to Sunshade Anchor Replacement .
4. Remove the power sunroof switch, if equipped. Refer to Sunroof Switch Replacement in Roof.
5. Remove the sunroof trim lace, if equipped. Refer to Sunroof Seal/Molding Replacement in Roof.
6. Remove the dome light, if equipped.
7. Remove the coat hooks. Refer to Coat Hook Replacement .
8. Remove the assist handles. Assist Strap Replacement
9. Remove the rail lamp. Refer to Roof Side Rail Lamp Replacement in Lighting.
10. Remove the windshield side garnish molding. Refer to Windshield Pillar Garnish Molding Replacement .
11. Remove the upper quarter trim panels. Refer to Rear Quarter Upper Trim Panel Replacement .
12. Remove the center pillar upper trim panel. Refer to Center Pillar Upper Trim Panel Replacement .
13. Pull down on the door opening weatherstrip seal on both the front and the rear doors.
14. Remove the 2 rear retainers (2) using J 38778 Door Trim Pad and Garnish Clip Remover. Disconnect the headliner electric harness at the right side of the rear window shelf. Rotate the right front seatback to a horizontal position. Remove the headliner from the vehicle through the right front door.
    

Disconnect the electrical connector from the actuator.
Important: Before removing the actuator, ensure that the pins J 41718 are tight and holding the cable.
Thread the J 41718 into the front sunroof window screw hole in order to retain the cable adjustment. Remove the sunroof actuator screws. Remove the sunroof actuator from the module. Did you look for a video on youtube ?

make sure the glass is closed, kneel on the drivers seat facing the rear of the car. Grab the sunshade with one hand on each side then pull the passenger side more than the drivers side, basically twisting the shade from side to side as you tug it firmly forward. Worked for mine hope it works for yours.

The rear sunshade will not go down on me 07 Toyota Avalon limited.

I have same issue, the shade work with the touch screen from radio but the rear button on the back between the heated seat button dont work. please help if you know, i have a 2013 300s v6.
thanks

Sorry Bill but you don't the tool's or knowledge to take on this job . Control module's involved.
Which one does your vehicle have ?
Power Sunroof System Components -- CF5
The power sunroof system consists of the following components:
• Front glass control module and motor assembly
• Front sunshade control module and motor assembly
• Sunroof switch
• Front glass panel
• Front sunshade
• Power supply for the front glass control module and motor assembly logic: RAP relay
• Power supply for the power sunroof system: SUNROOF MOD fuse 40 A
Power Sunroof System Components -- C3B
The power sunroof system consists of the following components:
• Front glass control module and motor assembly
• Front sunshade control module and motor assembly
• Sunroof switch
• Front glass panel
• Front sunshade
• Rear sunshade control module and motor assembly
• Rear sunshade switch
• Rear sunshade
• Rear fixed glass panel
• Power supply for the front glass control module and motor assembly logic: RAP relay
• Power supply for the power sunroof system: SUNROOF MOD fuse 40 A

The sunroof is powered by the same circuit breaker that power's your power window, so if your windows work than the circuit breaker should be good. You needed test the switch to verify if works with; on the factory sunroof system the roof is controled by a sunroof module the module receives a signal from the switch then throws voltage to the sunroof motor. The motor and module are located between the sunroof assembly and windshield underneath the head liner. You would reconnected the switch and test to see if the sunroof motor is getting power when the switch is in use by testing the dark green wire when closing and a light green wire when opening. Test these wires at the sunroof motor with a ohm meter or test light. Also, check this procedure to repair...

GM S-Series Pick-ups and SUV's 1994-1999 Repair Guide Power Sunroof - REMOVAL & INSTALLATION

Glass

1. Close the sunroof and open the sunshade.
2. If the piece of glass being removed is to be reinstalled, mark the location of the screws, this will ensure proper alignment during installation.
3. Unfassten the screw that attach the sunroof glass to the sunroof assembly.
4. Remove the glass from the vehicle.
   

To install:

1. Place the glass into position and install the screws that retain the glass. Do not fully tighten the screws just yet.
2. Adjust the glass so that the fit between the glass and the opening is equal at all four sides. The rear edge of the glass may be slightly higher than the front edge to reduce the wind noise.
3. After the glass has been adjusted, tighten the screws to 31 inch lbs. (3.5 Nm).
4. Check the operation and fit of the glass.
   

Motor

1. Disconnect the negative battery cable.
2. Remove the sunroof opening trim by starting at the **** joint and pulling the trim strip from the sunroof opening.
3. Remove the headlines as follows:
   1. If equipped, remove the overhead or sunroof console.
   2. If equipped, remove the dome lamp.
   3. Remove the coat hooks and the assist handles.
   4. Remove the sunshade-to-roof screws, while pulling down on the sunshade base, push in on the extended screws, loosen the screw that attaches sunshade to the roof and pull down on the sunshade retainer while pushing in on the extended screw. Remove the retainer.
   5. Remove the windshield garnish moldings using trim removal tool J 38778 or its equivalent. Pull the molding away from the pillar and up to remove it.
   6. On four door models, remove the body lock pillar trim panels.
   7. Remove the roof rear header garnish molding using the trim removal tool. Insert the tool into the front edge of the trim and work along the front of the panel, from one end to the other. Unplug the cargo lamp electrical connection and remove the trim.
   8. On two door models, remove the rear seat upper seat belt anchor bolts.
   9. Remove the upper and lower front seat belt anchor bolts.
   10. Remove the rear seat belt lower anchor nut (two door models only).
   11. Remove the end gate or liftgate opening sill plate.
   12. Remove the jack storage cover (left side).
   13. Remove the upper body side trim panel screw (left side).
   14. Remove the upper body side trim panel and the body side front lower trim panel.
   15. Remove the headliner from the vehicle.
4. Remove the sunroof console mounting bracket.
5. Remove the straps that retain the wiring harness.
6. Tag and unplug any necessary electrical connections.
7. Unfasten the screws that attach the motor to the sunroof assembly.
8. Remove the motor from the vehicle. Make sure that you do not move the sunroof mechanism while the motor is not in place.
   

To install:

1. Place the motor into position and install the retaining screws. Tighten the screws to 31 inch lbs. (3.5 Nm).
2. Attach all electrical connections that were unplugged.
3. Attach the straps that retain the wiring harness.
4. Install the sunroof console mounting bracket.
   

New headliners must be pierced to accommodate actual vehicle accessories.

1. Install the headliner as follows:
   1. Install the body side front lower trim panel and the upper body side trim panel.
   2. Install the upper body side trim panel screw (left side).
   3. Install the jack storage cover (left side).
   4. Install the end gate or liftgate opening sill plate.
   5. Install the rear seat belt lower anchor nut (two door models only). Tighten to 59 ft. lbs. (80 Nm).
   6. Install the upper and lower front seat belt anchor bolts. Tighten the bolts to 52 ft. lbs. (70 Nm).
   7. On two door models, install the rear seat upper seat belt anchor bolts. Tighten the bolts to 52 ft. lbs. (70 Nm).
   8. Install the roof rear header garnish molding. Attach the cargo lamp electrical connection, place the trim in position and engage the molding retainers.
   9. On four door models, install the body lock pillar trim panels.
   10. Install the windshield garnish moldings. Place the molding into position, align the retainer clips with the slots and press into place.
   11. Place the sunshade retainer in position, install the screw and tighten to 10 inch lbs. (1.1 Nm). Position the sunshade, install the screws and tighten to 10 inch lbs. (1.1 Nm).
   12. Install the coat hooks and the assist handles.
   13. If equipped, install the dome lamp.
   14. If equipped, install the overhead or sunroof console.
       
2. Install the sunroof opening trim. Start the trim in the center of the front of the sunroof opening and work around the perimeter.

Hope helps (remember rated this) Good luck.

My guess is the sunshades bind also. If not, check the wind deflector links. if the sunshades are binding, the guides need to be replaced, its a horrible design.