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Check all rubber seals for wear or breaks (especially the sun roof) and around any glass. That may be why the sun roof doesn't work anyway...water gets in and rusts mechanism. I would start up top first, then work down.
Hi. I was having trouble with my sun roof on a 2004 Montecarlo. I had two issues water coming in and would not operate fully. I could toggle the switch and it would not move very far. this is what I found. I started to pull down the lining and saw that the motor was in front of the sun roof. I found the drain lines on the front side corners of the tray around the inside of the sun roof. I found that the tube ran down the pillar's and out between the door hinge's. I took them off and blow them out one was plugged up. That fixed the water problem. The roof would move with help from me pushing. I got it opened and noticed the grease was hard. I cleaned up the grease and removed most of it with WD40. Now the sun roof works good as new. I thought the water problem was because the roof was not fully closed but I guess it is designed to have water pass by the roof seal and have it drain away. I always noticed water under the car after a rain or a car wash but did not realize iit was the sun roof draining.
Dear cz50001: there are only a few things that you, a weekend warrior can do to diagnose and/or fix the problem on your car.
Unfortunately the newer cars get, the more complex they get.
Unfortunately, your car is one which falls in the more complex category. Your car is designed with a "BODY CONTROL MODULE". This little gem gets input from nearly every electrical component in the car including the sunroof. In terms of what you can do to check it out: The fuse box inside the car has roughly 24 fuses positioned vertically 12x12. The fuse located at the lower left side of the box is a 10A "red in color" is for the sunroof. Remove it and look through it to see if it has been burned through the center. If it has, replace it and try the sun roof. If the fuse blows again, you have a short and it would be best left to a professional.
There is another set of circumstances which can occur that will render the sunroof inoperable. If the battery is disconnected or if the sunroof motor had been disconnected, the sunroof will stop operating. To reset the sunroof memory, with the key in the on position, push and hold the sunroof tilt switch in the forward (up) position until the sunroof is fully vented (tilted up) position. It should at that point operate normally. Should those two suggestions not solve your problem, it requires either a dealership with a specialized tool called CONSULT-11 to communicate with the BCM. There are some specialty shops such as mine equipped to deal with your car as well. However, most can not address this type of problem without this diagnostic tool. Good luck.
The motor is stripped out. The sun roof might be binding on the sun roof track and the motor is not strong enough to move the roof. I would first replace the sun roof motor if available seperately.
You mihgt have to get the complete assembly because of part availability
LOWER ROOF PANEL UN BOLT MOTOR TO SUNROOF 2-3 BOLTS REMOVE MOTOR THEN SLOWLY PUSH SUNROOF DOWN TILL IT ALIGNS WITH THE ROOF THEN REINSTALL THE MOTOR AND ROOF PANEL.
The sun roof has nylon gears that pulls the roof back and forward when activated. There is one on both sides of the sunroof track in the rear corners of the roof track housing. Unfortunately they are not replaceable by themselves and must be purchased as a unit for the whole roof track system. The cost of the replacement and labor to have it installed (if you can find someone to do it) is up to $1500 so isn't very practical to replace based on the value of the car itself. Better off to just work the broken piece out and manually put roof back in place in shut position and not use anymore, at least that was my experience with the one my daughter owns.
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