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Discussion Starter #1
Hello,

I've tried checking similar threads but just haven't found a solution yet.

Car power locks are completely dead. Key Fob and inside switches do nothing.
The problem started with just the driver door not working. Then driver, passenger and rear driver side not working. Now all 4 of them don't work.

What happens: There is a slight clicking noise from under the dash near where the fuse box is, passenger side one may twitch, but none of them actually change position.

Tests I've ran:
Tried both switches, neither works.
Tried key fob, including barely used spare, neither works. Fobs do still set/disable alarm and open trunk properly however.
Open interior fuse box and checked fuse. To be 100% sure, made sure sunroof fuse good by opening/closing sunroof and swapped. Locks still don't work but sunroof works fine using old lock fuse, so that wasn't the problem.
Pulling the #30 and #32 fuse relays causes no change in lock behaviour.
Checked for loose connections but as much as I can see seems to be fine and making contact.
Disconnected driver side door lock switch. Passenger switch and both key fobs still don't unlock any doors.
Disconnected passenger switch as well. Both key fobs still fail to open any doors.

It is a 2009 Cobalt. I don't know much about it as it isn't my car. I'm just trying to help my dad out here. I'm running out of ideas as to what to try or what may be causing this and appreciate any tips if people have seen similar things happen before or notice something obvious.
 

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I would disconnect P1 from BCM, then push it in and out several times to clean contacts. Notice pin 6&7



---------- Post added at 10:26 PM ---------- Previous post was at 10:00 PM ----------

P1 is the connector at the very bottom of the BCM.

 

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Discussion Starter #3
I tried unplugging and re-plugging it in 7 or 8 times. No change in behaviour. Did take a look at the connection and I didn't see any signs of corrosion.

Any other suggestions?
 

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have the locks been acting up like unlocking and locking themselves even when your not in it ( i had a similiar issue i just replaced my lock buttons in the car and that fixed the issue ) it was about 36 bucks for both sides from my local dealer
 

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The clicking you hear is probably the door lock relay you don't seem to have continuity. Door lock actuator fuse is a 15 amp fuse #26 lower left corner. Don't just visually look at it. Pull it out and if it's good re-insert 180°s.

If all this is good you are looking at maybe a ground problem but other stuff would also not work in my view.

Did you check for voltage on pin 6&7?
 

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Take a look at the door switches...when I replaced mine, one of them had "pinched" wires that rubbed through outer jacket. Still needed new switches, but pretty sure the grounded wire wasn't helping...car was probably built on Friday @ 4:59pm...;)
 

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Hi jayhawkmikes,

I'm sorry to hear that you are having difficulties with your power door locks. Have you been in contact with your dealership in order to further discuss this concern? If not, we will be happy to contact them on your behalf. Feel free to send us a private message with your full contact information, VIN, current mileage, and dealership name if we can help with your concern. We look forward to hearing from you!

Kristen A.
Chevrolet Customer Care
 
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