Once inside the car, the lock and unlock vacuum lines travel beneath the carpets and in some places underneath flexible black plastic covers. Begin by removing the floor mat, if equipped, and carpet in the driver's foot well.

With the carpets removed, look along the end of the foot well nearest the driver's door and find the black plastic cover that protects the vacuum lines beneath. Lift this cover up as shown to expose the vacuum lines.

As mentioned, the red lines are the lines for the lock side of the circuit. The highlighted line is the one that enters the car from inside the door. Note - the top of the picture is facing the front of the car. This line connects to the switch and is the one that you plugged in the previous step.

Disconnect this line from the rubber "Y" 3-way connector.