check the fuses..the obc is connected to several different ones...the switch to the right under the dash might also be the culprit...just attach the wires to the two prongs...either way...doesnt matter..good luck I recently got my car back from the upholstery shop and now my windows do not work, sunroof is working fine. I believe the button under the steering wheel is disconnected, but I don't know which wires are supposed to be connected. My on board computer next to the radio is not working either. Any suggestions would be appreciated.