Ill start off by saying that I have an '04 Rubicon. The "Front Lock" light is blinking on my dash even though the front locker is not engaged. This light stays on at all times including in 2WD and 4WD and whether my jeep is on or off. I tracked down the problem to be a broken wire going to the back-drivers side of the the front differential. There is a device that screws into the back of the differential where the wire used to connect to. Any ideas of what this is called?
Also, I now have unscrewed this device and put it right back in. Now I have severe popping noises when I turn. I have gotten the front tires off the ground and turned the wheel back and forth and the same popping does not occur off the ground as it does on the ground. It also tends to happen more as I'm turning and moving conjointly. Also when slowly moving and turning the front tires spin at different speeds. The steering will bind as I turn, pop, and then turn further.