Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, 2008 SRX locking/unlocking issues in Cadillac SRX Forums; My passenger rear door seems to only lock and unlock after it has been sitting for a while. If I ...
My passenger rear door seems to only lock and unlock after it has been sitting for a while. If I drive it and then put the car in park all 3 other doors unlock except for that 1. I have checked the fuses and nothing is wrong. Any ideas?
I apologize you are experiencing this with your rear doors. I am not sure if you are looking to make this repair on your own or work with your dealership. If the dealership route is one that you plan on taking, please reach out via private message with your full contact information, VIN, current mileage, and preferred dealership, and I would be happy to assist with setting you up with them.
Amazingly, I have exactly the same issue with my '08 - right rear lock will function a couple of times in a row, then fail to pull all the way up or down. Power is getting to it, you can see and feel it try to move.
I took it out and wiggled the wiring and pulled the lock up and down many times. It has the same failure mode when just hanging by the wires - works a couple of times when cooled off, but then fails to pop all the way. Allowing it to cool a few minutes gets it to work again for a pass or two.
Got to be the solenoid in the switch, since both rear doors are wired in parallel, and you can see it's getting power. Tried to take it apart, but the mechanism is riveted together. Bought a used one on Ebay, should be in tomorrow. I'll report results. Not really difficult to replace, but you will probably destroy the moisture barrier liner unless you are very careful. If you want to attack it, I can walk you through the panel removal and lock switch replacement.
Just to follow-up; I received and installed the used lock. Works great. I did a little research, and discovered it's pretty common in GM trucks. The culprit seems to be the little motor built into the lock mechanism that runs the lock up and down (not a solenoid as I thought, but a little DC motor). The Chinese-made motors wear and begin to stick after awhile. Can't easily get in to check or clean the motor because the mechanism is riveted together.
A hint when removing the door panel, be very careful to not tear up the moisture barrier sheet; mine had been off previously to repair a little ding, and it tore up pretty bad when I removed it the 2nd time. Bought a new one from an on-line supplier for $20 and all is new again. part # 15252551 for Rt Rear.
Oh, on a positive note: the door panel design and execution on this car is the best I have ever seen, even beats Mercedes. Materials are really good, there's a quick-disconnect electrical connector, and the push pins are totally reusable. I'm really really impressed. Give that guy a raise.