My C70 sun roof is not openning and switch is making noise and flashing.

Did you use a voltmeter an check for B+ voltage to the switch ?

• The roof opening panel does not open or close

• Roof opening panel adjustment.
• Battery junction box (BJB) Circuit Breaker 601 (30A).
• Circuitry.
• Roof opening panel switch.
• Roof opening panel motor assembly.
• Roof opening panel lifter assemblies.

• Go To Pinpoint Test E .

there is a gear on the motor they do wear out. try to give it a hand a few times if it makes a crunching sound wile you giving it a hand the the gear is warn out.

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.

Looks like the s/roof needs to be put back in its channel so it can easily slide. Try if possible.

may have slipped on the track mechanism and needs adjusted custom car shop may help with this..good luck..

Bad all window switch, for front window something came loose or broke possible bad motor gear

caution if it opens you may not be able to close it again, this sounds like the track broke or something in the motor. lets hope its the motor as if its the track then the whole track needs to be replaced, there is no repairing a broken sunroof track.

It's typically the motors or the special drive tubes that it uses. If you here a clicking noise then the sunroof became to tight and ruined the motor gears. You can actually switch the two motors, one is for the shades and needs less power then the other motor. They are identical, switch them. Nex make sure they are very tight to the 3 mounting bolts, there is a rubber washer bushing that wears out and alloys the motor to flex too much, causing the gear mis-alignment and gear grinding. This works great I do it all the time.

check fuse F1.401, 30 amp in central junction box (in truck). Check your owner manual for fuse information.
Headliner must be removed to access motor.



Visual Inspection Chart Mechanical Electrical

• Roof opening panel
• Roof opening panel frame
• Roof opening panel drain hoses
• Roof opening panel lifter assemblies
• Roof opening panel water trough
• Roof opening panel air deflector assembly
• Roof opening panel seal
• Roof opening panel shield

• Battery junction box (BJB) fuse
• Circuitry
• Accessory delay relay
• Roof opening panel switch

• The roof opening panel does not open or close

• Roof opening panel adjustment.
• Battery junction box (BJB) fuse.
• Circuitry.
• Roof opening panel switch.
• Roof opening panel motor assembly.
• Roof opening panel lifter assemblies.

• The roof opening panel does not open or close — one direction only

• Circuitry.
• Roof opening panel switch.
• Roof opening panel motor assembly.

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