Probably the best thing to do is to take the 4 bolts that hold the seat in and take it out of the car so you can inspect the seat tracks better. Using a multimeter, check for continuity at the wires going in and out of the switch when the switch is flipped for tilt. Might also just be a broken or lose wire going to the motor. Try putting 12V to the motor by using cables and see if it actually turns. Then you can pinpoint if its the switch or the motor. If its the latter, just get a used seat track off ebay or a junk yard. Good luck.