How do you remove the airbag to check the clips? Do i need any special tools?
Don't bother removing it to check it. The odds of that just "popping off" are extraordinarily unlikely unless someone has physically removed the airbag recently. They just don't pop off on their own, they are potentially a life-saving device and the precautions taken to keep them from just randomly becoming disabled have been successful for millions of Wranglers on the road.
The common denominator for these kinds of problems IS the clock spring. If you are going to remove the airbag, you might as well have a clock spring ready to go in. You're well on your way to installing one.
To remove it, you need a 90* pick with a pretty long tip past the 90* bend. [I took a torch to a straight one and bent it]. A flashlight and a mirror would help to.
Don't waste your time checking the harness. IMO.