I could use a hand coming up with a way to trigger the door sense circuit in my car...   I've added an Omega window roll down module to my car and would like to trigger after the last window is rolled up.  The two wires that I have to trigger off of are the wire going to the last window motor and the switch (the wire has been cut and taken into the Omega module).

At rest, both wires will be at ground.  When the physical window switch is pressed, both wires will be at +12 votls with current running through.  When the Omega module rolls up the window, the switch wire will be at ground while the motor wire will be at +12 volts.  I would like to trigger AFTER this happens.

The trigger needs to take my door sense wire and momentarily ground it and then return to an open circuit.  Any help would be greatly appreciated.  Thanks!