Im an authorized Ford alarm installer. The sensor is supposed to be tied to a wire harness. If its not picking up any vibration, the sensor could be bad. On the side of the sensor there should be a white knob, turn it clock wise to make it more sensitive, and counter clockwise to make it less sensitive. Tap the sensor and make sure he red light comes on. The wire should be longer then 6 inches, that wire is 12 inches. As far as the door triggering. There should be a white small 22 gauge wire coming off your alarm module. That wire should go towards the drivers side kick panel and connected to a black with blue wire. Also, when you arm the alarm, wait 15 seconds after the second chirp that tells you the alarm is active, then open the door. A way to test that the wire is connected to your doors is to 1) make sure your door pin switches turn the dome light on. 2) arm the alarm with the door open you should only get one chirp. Close all the doors and wait for the dome light to turn off, soon as the dome light turns off you should hear a second chirp that the alarm is armed. Make sure your system is not in valet. The light on your dash should not be blinking when the alarm is off, it is double flashing then pausing then its in valet. press the dash light and release it that will remove it from valet. The switches #2 and 4 inside the module are for delayed trigger for cars that have outside keyless entry pads. this is so the alarm doesnt trigger while there entering there code. the other is to turn off passive starter kill. The way you descibed your system I am assuming that its a Ford factory keyless upgrade alarm. VSS 400. Any questions email me
ruse1973@aol.com