Update..
When the trucks in netural and I push the 4hi button, both 4hi and 4lw buttons blink a couple of times then it lights the 2hi button back up. It will go into 4lw in netural. Nothing happens when in park. Also when I put it in netural to go to 4 lw you here it ingageing, but the indicator light does not come on, but its in 4 lw. Any more help would be great b4 I shell out mory $$$. Thanks.