My 2006 FX4 4x4 will not engage in Hi or Lo. No lights come on the instrument panel and no mechanical changes. I have checked the two fuses which are labelled 4x4 in the user's manual. I have seen relays referred in other articles but not sure where these are. Any suggestions on the next thing to check would be appreciated.

Update: I reset the computer as recommended in another post and all is well now!!

Thanks