The fuel pump relay in a 2003 ford ranger with the 3.0l motor can be found in the main power distribution panel that is located in the engine compartment. this relay is what distributes power from the battery to your fuel pump. if you are having problems with your fuel pump the first thing that you should do is remove and replace the relay. this usually will reset the pump and can fixa lot of the problems with it. if a new relay does not fix the problems then you will want to replace the fuel pump itself since it is possible that it could be failing. a failing fuel pump will lead to decreased pressure at the engine and it could stall.
The fuel pump relay in a 2003 ford ranger 3.0 is located in the fuse box inside of the engine compartment.