Doors will not unlock

[assafpressman]

The doors on my Chevrolet Venture would not unlock if I hit either buttons inside the car. They would however unlock when I use the remote or when I put the car in Parking. Any suggestions ? Does anyone have the wiring diagram for this car?

[gearhead514.2008]

You have a problem that has plagued these vans for a long time. I would bet that you have a corroded wiring splice connection under the carpet in front of the front seats. Go to Advance auto or Autozone and pick up a Haynes manual on your van. The wiring diagram in the back of these books are adequate for what you are doing. Obviously check the door switches first to see if they are bad. They are probably fine. Anyways, pretty soon your power windows will quit working and your taillights will act up too. You will have to remove your front seats. Just the front ones. A few bolts and some plug connectors and the seats are out. Next pull back the carpet from the dash to about where your seats were. There is a big bundle of wires that run across the floor. Unwrap all of the tape that surrounds these wires all the way across the floor so that the individual wires are showing. Next you will see about a dozen or more small pieces of black duct tape around some of the wires. Remove all pieces of duct tape and you will see a crimp connector that connects 2 to 5 wires. Like I said, there are a dozen of these. One of these connectors is for your power door lock switch. I don't have a book in front of me, but I am pretty sure it is the white and light blue wires. Check the crimp connectors on these wires and see if they are corroded or they might have fallen apart already when you pulled the tape off. Repair as many of these as you can and seal them up good so they are watertight and put everything back together. Fix what you can now and do it right or it will be back to haunt you. The reason your remote works is because the remote goes through the body module and out to the locks. Your inside lock buttons go through the wires in the floor and then up to the body module. The body control module is on the passenger side just above the kick panel to the right. When you unwrap these wires at the beginning, unwrap across the floor and up to the body control module becaude I think the white and light blue wires for your lock buttons are toward the body control module more. Just be thorough and you will not have a problem. Moisture gets in these crimps somehow and corrodes them and then all your gadgets quit working. Good luck. If you need more info. Reply back.

[cjstew4]

You may want to also check that you still have your 90 degree A/C drain tube that usually falls off the firewall. When it falls off, the condensation from A/C drains into and under the passenger side floor carpeting and wreaks havoc on the wiring "gearhead" spoke of. There s/b a few threads on checking and replacing this. Mine leaked for over a year before I found out the cause beyond my wife continually spilling he coffees and sodas. I will also leaked, as it did mine, into the drivers side carpeting.