How do you know when wheel bearings are going out on 1994 Jeep Grand Cherokee

Jack it up, just enough to get tire off ground, and put your hands on top and bottom of tire and wiggle it.. It should have no movement. Doing the same thing from sides is different, there could be play in steering, but not much. And please, do not have your feet/legs under car doing this. Also, it may have a sound that does not seem right, a grinding sound, and tires wearing unevenly

http://www.jeepforum.com/forum/f11/front-wheel-bearing-symptoms-687889/ -that is what the guy means by 12 and 6 o'clock

Just to add to FN good answer,the rim will get hot all so,

True. I didn't think of that. Also maybe an odor coming from hub Good evening TST

Evening FN,

And if it's front. you will probably feel vibration in steering wheel

MOVEMENT AND NOISE./ DRAG /RIGHT

My answer is exactly the same as the rest of the great answers you already got. Should be around a $200 fix if it didn't go too far..