ohhh ok, well i know some batteries when not charged for long periods of time will just die entirely because the lack of keeping it charged it will just lose its longevity and ultimately cause it to only take a couple mins to charge it fully but then it will lose that charge just as quickly.. How ever if your sure everything is still connected properly that may be the issue. Does your model have the battery gauge ? If soo i would charge the batter until its fully charged and then try to drive around a bit and see what happens.. If you do not have the gauge then i would just stop the truck from time to time just to check the steering and see if it gradually gets slower and slower in a very short amount of time when in use. If so.. the battery is worn out and just not holding a charge.