its closed position preferrably one such limit switch 28 is provided for each closure 24 the motor vehicle may also include an electronic lock 30 which is actuatable by the circuit 22 when such lock 30 is present the system will simultaneously actuate such a lock with its associated closure whenever the closure 24 associated therewith is commanded to close for example whenever the window 24 of the driver 39 s door of a vehicle is actuated to its closed position the lock in the door will be actuated to its unlocked position the system 20 further includes a moisture sensor 32 when the sensor senses moisture in excess of a predetermined threshold it produces a signal which is received by the circuit 22 with continuing reference to fig1 a twelve volt dc power supply not shown is coupled to the circuit 22 at power input 34 twelve volts dc can also be coupled to the circuit at 37 through the vehicle ignition switch 36 to disable the circuit as will become apparent when the circuit is described in greater detail to that end twelve volts dc are coupled to the 34 acc 34 contact 36a at the ignition switch as will become clearer below whenever the ignition switch 36 is turned to its 34.