This paper describes the design and implementation of automatic car washing system for the exterior of the vehicles using PIC16F877A microcontroller. There are five main parts to implement the system; moving, washing, foaming, brushing and cleaning. To accomplish the system, conveyor, LDR sensor circuits, motor driver circuits, pumps and motors are comprised. The conveyor is used to carry the vehicle and moved from step to step. The sensor circuit sensed and input data to the PIC. The outputs of PIC are commands to drive motors and pumps.