In this article, artificial potentials approach is used at localization of the mobile vehicles in Wireless Sensor Netwoks with hop-count method. For a mobile vehicle which travels in a WSN, to find a better route two common principle can be considered. One of them is hop-count and the other one is artificial potentilals. Both of them provide the mobile robot to find it's best next step to the target position. We'll discuss about these methods and also offer an approach that these methods are used together for localization of a mobile vehicle in a wireless sensor network.