Click and No start

Picked up a 03 friday, ran awesome got great fuel mileage on the way home. Drove it around that evening quite a bit, shut off and restarted fine. I thought my batteries sounded like they were getting weak, then saturday morning i start it up throw it in reverse and im about backed out when it dies. No funny noises just dies, Now everytime i try starting it back up i just hear the solenoid click and nothing else. I went ahead and put 2 new batteries in it and checked all connection and still just a click. Only other thing i found out of ordinary was this wire under the starter relay.