2001 Cruiser with 98,000+ miles. Runs great. Have had a couple of major issues, but all were eventually resolved. (Gotta love extended warranties

)
HELP! It seems the cruise control arm has broken inside the column. Got out on the highway after work today, pressed the magic button, pushed the arm down to engage and...nothing but a flopping control arm.
Husband took a look, and we have question(s):
*Any tips on removing the steering wheel cover so he can take a look at what the problem is without screwing up the air bag and/or other stuff?
*Hubby can probably fix it, but we would like some general direction on how. He's worked on all our vehicles, but he's a little reluctant without some kind of diagram so he can see what he's getting into. Any suggestions?
*Is this a common problem? We live in the southwest, with summer temps consistently over 115 for weeks on end. Could heat have possibly weakened the arm at its base?
Really appreciate any advice. We bought it used three years ago because it was all we could afford at the time; and we (I) promptly fell in love with it. Unfortunately, I do a lot of highway driving and use the cruise A LOT!
Thanks in advance.