Power Steering Problem
 

I have a problem with my power steering wheel control. I had my 2004 Rx8 for about a month. In the past 2 weeks my power steering stated to go on and off and the sign would come on the hash. Now it is gone most of the time and when the power steering comes back, it only does for 2 to 3 miles then it goes bad again. when it goes bad it becomes very hard to turn. I was told that there is bad connection to the line that goes to the battery but I'm not sure what to do. Can anyone help?
Hamza Ziadeh