Crockpot Corned Beef and Cabbage in Beer

3 lb. corned beef (don't use seasoning pack)
4 potatoes, peeled, cut in 3/4" chunks
2 carrots, cut in decent chunks
1 onion, sliced
2 bay leaves
1 12 oz. can of beer
1 head of cabbage, cored and cut in 8 wedges

Place all items in crock pot If cooking 8 hours, cook on low, if cooking less, cook on high.