First check and if you can hear the pump with the key on and the engine off. If you can't hear anything the next step would be to test the wire and see if you are getting power. If you are getting power to the pump then it's probably bad but another step beyond this would be to hook up some jumper wires direct to the battery to see if it runs just to be sure you don't have a ground problem or something. If you are getting no power to the pump then you will need to start checking other things out like the switch, wires, fuses and so on.