99 Expl stuck in low?

Never had 4 wheel drive so I'm a novice at 4WD. My son called and said his 99 Expl 6Cyl is stuck in Low. He will bring it over tomorrow. I read the posts on a 93. What do I need to check first? Any info will be greatly appreciated.
Thanks in advance.

First thing I would do, is take a hammer and start tapping on the transfercase motor it is connected on the back of the transfercase it should look a lil something like this http://tbn0.google.com/images?q=tbn:BAO7a3nXJGHj3M:http://thumbs.1aauto.com/FWM/1AFWM00006.jpg
beat on it a little with a hammer while having the nob in 4high and in neutral and if that dont work take the shift motor off and manually put it in 4high

I'll give it a try tomorrow morning. Thanks

No problem, You're welcome. Goodluck with it. You may need to hammer it a little hard just don't dent the shift motor casing :)

I dont know if i am to late but i had the same problem with my 98 and found that that shift solenoid under the hood was stuck. i switched it with the solenoid for the windows and it worked then i put the original one back in and that one started to work agian and now have no problems. i call it a solenoid for lack of better terms but it looks like a huge fuse. look up your fuse descriptions and you should see it there.

I dont know if i am to late but i had the same problem with my 98 and found that that shift solenoid under the hood was stuck. i switched it with the solenoid for the windows and it worked then i put the original one back in and that one started to work agian and now have no problems. i call it a solenoid for lack of better terms but it looks like a huge fuse. look up your fuse descriptions and you should see it there.

Good info, I'll have to remember that, because I forgot sometimes disconnectnig the batt. will do the trick too.

I think they call it a relay?