Good day all. My 04 600 is having problems with AWD in reverse. The battery was dead on it, so I put the charger on over night. It fired up great but now I have no AWD in reverse. The funny part is when i put it in reverse, the AWD light comes on on the dash and stays on, even without holding the over-ride button. It appears when I am in low or high that the front wheels have power if I spin the back wheel, but when in reverse, the two back wheels are spinning but not the front wheels. Any ideas??