I was pulling my boat out in 4x4 mode as usual when I tried to switch it off when done the 4x4 light stayed on and now the switch doesn't do anything I checked fuses disconnected battery .when I start the truck up it makes a few clicking sounds in the dash I pulled the dash and there is a plug going into a grey part it clicks 4 times then stops . any help is appreciated thanks. I HAVE A 1998 EXPEDITION XLT 4.6