I was sitting at a red light and heard a clank. Then my jeep would not move. I figured I spunt a rear hub. I then locked in my manual front hubs and put my twin shift transfetcase in front high and my jeep still wouldn't move. I noticed that my front drive shaft was turning but my front wheels were not. Recently someone said they fixed my compressor under the hood for my on board sir it did put sir to my rear bumper (it is a air tank) I noticed that my arb locker lights on the dash were not working. So if there is no sir going to the lockers would that cause the axles not to turn at all. I know nothing about arb lockers and need some help.