Door Locks not working when pushed to open only the drivers door opens?

Hi meltoff,

There are three fuses that run the system we need to check but it sounds like the BCM is out but to be sure here is a guide to show you how to check for power and the door lock wiring diagrams so you can see what to test and how the system works along with the fuse locations below.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here is how you change out the BCM is it tests bad. You will need to have it programmed before it gets installed. Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Hi,

This is likely an issue with the wiring at the body control module. I will try to explain how it works. When you press lock, power flows one direction causing the actuators to react in a specific direction. When you press unlock, power flows in a different direction causing the opposite reaction by the actuator.

Now, if you look at the attached pics, I highlighted the wires that are responsible for unlocking the doors. They go from the switches to the body control module (pic 1). What needs to be done is to first check the connection at the BCM and make sure it is not loose or corroded where the plug attaches to it.

Next, see if there is power being sent to the switch via the wires highlighted. If there is power, then the ground, which has a splice in it, needs checked. Note that the ground is for both lock and unlock, but two wires go to one ground. They are spliced together. There is a chance that the unlock ground has failed but the lock ground is still good. (Pic 2)

I know this sounds confusing, but let me know if you have questions or need help.

Take care,
Joe

Hi,

The body control module is located under the dash to the left of the steering column. Take a look at pic 1. Remember, before disconnecting or reconnecting the BCM, you should have the battery disconnected.

As far as testing for ground, simply place your multi meter on the ohms setting. With the battery disconnected, check to see if there is continuity between the black and white wires on the switch and a known good body ground point.

Please feel free to let me know if you have other questions.

Take care,
Joe

Hi Norton72,

Symptoms indicates the door lock motor ( actuator ) is malfunctioning and it could be the wirings or the motor itself.

Here are the test you can carry out.

POWER DOOR LOCK MOTOR
1.Remove door panel for access to door lock motor assembly. Disconnect 10-pin electrical harness connector from door lock assembly.

2.Using jumper wires, apply battery voltage and ground to specified terminals on door lock assembly and check that door lock motor moves door lock link to UNLOCK position. Reverse jumper wires so polarity is reversed and check that door lock motor moves door lock link to LOCK position. See Fig. 10 . Replace door lock assembly if operation is not as specified.

Hi,

You are simply checking to see if there is continuity to ground via the white wires with a black tracer. Note that the white wires with the black tracers goes between the switch and a body ground. See attached pic.

Joe

All door lock motors are in parallel so if any stops working, it would not affect others.

Hi,

If you are checking the white/black wire to ground, yes. If there is no continuity to ground, then the ground source needs checked.

Joe

Hello,

The BCM runs the door locks and I have seen problems with the BCM in these cars. But to be sure here is a guide to see where you are losing power at.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here are the door lock wiring diagrams see when signal is lost.

Check out the diagrams (Below)

Please let us know what happens.

Cheers, Ken