Okay i have a 2001 dodge dakota quad cab auto trans .My problem is My 4x4 switch or something is weird here what it does to me service 4x4 light on dash will be on switch wont work ill be driving it and light goes away and 4x4 switch lights up and works and does engage if i switch it .. Ground wire????? Works till i turn truck off then it wont work till i hit a bump im guessing or something