My girl has a 2007 Hyundai Accent GS. Her passenger window doesn't go up or down using neither door switch. I have tested the switch and motor both work providing 12.6-12.10v. We purchased a new motor and regulator still doesn't work. When I put different supply of 12v to the motor the window go up and down. However, if I use the original wiring in the car it doesn't work. I don't understand what is missing and have grown very annoyed with the situation. If the switches where bad I would assume it wouldn't work for one side. If the motor didn't work another source of power wouldn't power it. Testing done with 12v test light and multimeter. Could someone please give recommendations at this point I'm at a lost? Any help appreciated.