94 s10 blazer 4wd won't engage.

I was driving in 2wd and all of the sudden my radio and dashlights flickered off and back on. I smelt a burning in the cab, but it went away. When I tried to use 4wd after that it just clicked and blinked then went off. I replaced the tccm but the same thing happened. also the auto doorlocks don't work anymore. Any help would be great. Thanks.

Have a good look at the fuse and circuit breakers and fuse links.
And start looking for that burnt wiring or what burnt..
The smell may have went away but the burnt wiring or what ever burnt will still be there.