When you changed the column, you may have changed the key. The key maybe chipped and needs to be reset at the dealer. About $120 plus the tow.
disconnect all electrical connectors under steering colunm. remove bolt from steering shaft and slide shaft apart. pop the shift cable off. remove the four bolt holding the colunm to the dash and remove the colunm. under the ignition switch will be a hole, with the key in the run position stick a small Phillips or what works best is a 20 torx screw driver into the hole and remove the ignition switch. follow proceedure for new colunm.
Lower the steering colunm. the ignition switch is located on the top of the steering column about 6 inches from the firewall.
Look under the dash to the left of the steering colunm. Its not the easiest thing to get to but that is where it is.
Possibly broken wire in the steering colunm to the air bag .
Broken wire in the steering colunm.
Yes with a lot of time and labor plus a bunch of special built parts not the least a steering colunm.
Look directly under the steering colunm in the passenger compartment... should be located just under the dash.
Its a common problem with the 95 to 99 Chevy tahoes. Theres a sensor by the steering colunm that goes bad. go to this forum with all the info. www.automotivehelper.com/topic317059.htm
the skelatal system
It is the light switch on your steering colunm you need to replace it, they are about $80 dollars when I replaced mine a couple years ago
in the steering colunm just a couple of screws i had the same problem shortly after i bought my 94 Nissan the whole switch comes out and i bought a new one for 70 bucks from autozone very easy to replace
yes you do have to be a contourcionist to work under the dash of a jeep,I have an 88 wrangler. I have to take the drivers seat out and lay on my back and feel my way to the brake lite switch as it is above the steering colunm.I believe yours is below the colunm