Methods, systems, and vehicles are provided for controlling rear wiper units and rear washer units for a rear windshield of a vehicle. In accordance with one embodiment, the vehicle includes, in addition to the rear windshield, the rear washer unit, and the rear windshield, a control system. The control system includes a detection unit and a processor. The detection unit is coupled to a single input device onboard the vehicle. The detection unit is configured to detect a user's engagement of the single input device. The processor is coupled to the detection unit. The processor is configured to at least facilitate automatically controlling the rear wiper unit and the rear washer unit based on the detecting of the user's engagement of the single input device.