Driver side door doesn't unlock with key fob or center console unlock button

[sapote]

Good point, I hadn't considered that but it could certainly be causing the actuator not to receive full voltage. It's sure a hell of a lot easier swapping a relay than an actuator, I'll test it out.

EDIT: dammit, the relays are in the GM5 module...

If you have a power supply then connect 15v to the front jumper posts engine off (one volt higher than 14v with engine running) and see if the pitted contacts can kick the actuator to work.

[Barracooda]

You will be surprised it's the pitted relay contacts. How do you know it's the actuator and not the relay?

Good point, I hadn't considered that but it could certainly be causing the actuator not to receive full voltage. It's sure a hell of a lot easier swapping a relay than an actuator, I'll test it out.

EDIT: dammit, the relays are in the GM5 module...

[sapote]

Technically it's still true because it doesn't work for unlocking no?

Well, the console lock/unlock is not a variable here as it's already not working. The title implies the console switch can lock the door (as the fob lock button).

[sapote]

so I'm fairly sure it's the actuator.

You will be surprised it's the pitted relay contacts. How do you know it's the actuator and not the relay?

[simon_c]

Then it's better to edit the top post and the title as they are misleading.

Technically it's still true because it doesn't work for unlocking no?

[Barracooda]

Mine is doing the same thing on the driver's side, locks fine but won't unlock with the fob or the center button. I can hear it trying to unlock, so I'm fairly sure it's the actuator. I believe the drivers side actuator does wear a lot quicker since it gets cycled more than the passenger door from normal use.

[Mystic03]

Fixing the relay is 10x easier than replacing it. Unsolder the many pins device is not an easy job and can cause damages to the signal traces on the pcb.

Sorry..I should have said repair. Yes, I am not intending on replacing them. Thank you!

[sapote]

I think this is going to be my first troubleshooting step (cleaning the relays). I need to remove the driver door panel to fix the common speaker/door card rattle at some point too.

Have you tried with other keys?

[sapote]

Mine behaves the same, except its the passenger door. I hear the relays buzzing though, so I plan to replace the relays this winter and code my new keys. Hopefully that fixes it.

Fixing the relay is 10x easier than replacing it. Unsolder the many pins device is not an easy job and can cause damages to the signal traces on the pcb.

[sapote]

You know what the center button doesn't work at all (for either driver or passenger door or locking/unlocking) now that I've checked it.

Then it's better to edit the top post and the title as they are misleading.

[simon_c]

Mine behaves the same, except its the passenger door. I hear the relays buzzing though, so I plan to replace the relays this winter and code my new keys. Hopefully that fixes it.

I think this is going to be my first troubleshooting step (cleaning the relays). I need to remove the driver door panel to fix the common speaker/door card rattle at some point too.

[Mystic03]

Mine behaves the same, except its the passenger door. I hear the relays buzzing though, so I plan to replace the relays this winter and code my new keys. Hopefully that fixes it.

[sapote]

You know what the center button doesn't work at all (for either driver or passenger door or locking/unlocking) now that I've checked it.

If the console sw doesn't work, then maybe the key fob unlock button is bad. SAme with another key? If all keys can't unlock, then I tend to think it's the GM5 driver door relay contacts are bad. Just locate the correct relay on the board, then cut open the relay plastic cover and clean up the pitted contacts and it should work again. I had done this twice for 2 cars.

[simon_c]

Does the center button work at all? Those can blow out along with the hazard switch and cause issues. Take it out and have a look not sure if it is wired in line with the whole locking system though. If the passenger side locks and unlocks with the center button it's probably not your issue tho.


Sent from my iPhone using Tapatalk

You know what the center button doesn't work at all (for either driver or passenger door or locking/unlocking) now that I've checked it.

[trigtm]

Does the center button work at all? Those can blow out along with the hazard switch and cause issues. Take it out and have a look not sure if it is wired in line with the whole locking system though. If the passenger side locks and unlocks with the center button it's probably not your issue tho.


Sent from my iPhone using Tapatalk