Abstract: A rain sensor system automatically controls windshield wiper action such as the length of time between windshield wiper strokes and/or wiper motor speed and is preferably integrated with a vehicle antenna. The rain sensor system comprises first and second electrical conductors spaced uniformly from one another and an electrical insulator interposed therebetween. A dual network voltage divider circuit couples the first conductor to an applied reference DC voltage level, and the second conductor is coupled to ground potential via a similar network. Airborne raindrops and moisture temporarily adhere to the exposed surfaces of the insulator to electrically couple the exposed surfaces of the first and second conductive surfaces to lower the electrical resistance therebetween. The magnitude of the applied voltage changes in relation to the intensity of rainfall or amount of raindrops adhering to the conductors to affect the rate of windshield wiper action.