4x4 not working
 

2002 F150 Scab 4x4, 5.4 in my signature. 147k miles
Yesterday, I went to the beach intending to drive out on the sand for a ways and enjoy the water, sand, and maybe fish a little. When I turned the 4x4 switch to 4H nothing happened and when I turned it to 4L nothing happened. The lights in the dash did not come on. What is the typical issue in this situation. I have started looking in the manual but haven't done any real trouble shooting yet. It appears the fuses are hidden well. Any help or suggestions from knowledgeable members would be appreciated! Thanks!