Kia Troubleshooting Questions? Ask a Mechanic
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
If the motor work when it removed in both directions then the problem is likely with the regulator and or the glass may be binding in the channel. See if you can move the glass up and down smoothly with the motor removed , that should tell you id the regulator is binding. Check this and let me know and we can work from there.
Are you sure you getting power to the motor in the up position with it mounted?
Okay check and see if you have power and ground at the motor while holding the switch in the up position. If you are lacking the ground it will not work , the motor is controlled by switching the ground for up and down movement.
Okay Im here if you need me.
Do you have the power switching from side to side when you work the switch for up and for down?
Your using the test light correctly, the best way to check the switch is at the motor, you should have power on on side of it while holding the switch in the up position and power on the other wire while holding it in the down position.
No problem, Im here if need be.
Okay the way the switch works is it switch the ground from side of the motor to the other side to reverse the current to make it move up and down. It looks like you are not switching your ground which is either a bad switch or a loos of ground from it to the motor. The fist thing I would do is inspect the wires that come through from the body to the door to see if you have any broken wire usually caused from open and closing the door.
It not very likely that both switch are bad, it more likely you do not have a ground to that leg of the switch. Looking at the wiring diagram it looks like the ground for the circuit come from the master switch, see the diagram in the link below, you may want to check the wires from the body to the driver door as well.https://dl.dropboxusercontent.com/u/104923897/Power%20windows%20Sept%2025.pdf
That sure sounds like a wiring concern to me and perhaps its on the door . Possible something pulling on the harness to the switch.