Ok, thanks for the info, I will check this afternoon. As far as I can tell, the pump is not running. I hooked up my vacuum gauge and was not getting any pull from the pump. Of course that truck is very loud, so I will have someone turn the key on to see if it come's initially. Also the 4x4 light does come on when you flip the switch, I have the hubs in Auto and I can tell that they are not engaged.