Alright, i was towin my buddy out of some mud and my 2000 Zr2 blazer got stuck in about 9-10 inches of straight mud and tall grass.
The grass was rubbing my hot exhaust and caught on fire, the grass on the ground caught the grass in my under carriage on fire and my 4wd hasnt worked since.

I think i may have found why, But what do i need to do about it.
heres a picture of the damages:

what is that?

 

Wow...Sorry man you could have also messed up the vac lines

 

Thank you. It's still shifting and driving fine in 2wd
do you have any idea what that hose or that plug is?

 

Need a better picture. That looks like the speed sensor for the rear abs from that pic. Also looks like the one vac line is chard and swollen. And it looks like another loose line off to the left. Pull the plastic shielding back and check the wires. Unplug it and inspect the plug end.

What do you mean it hasnt worked? Do it just go out? Wont shift into 4wd? Details.

 

ChrisC is right, did it just go out? (now it won't shift back into 4wd?) we need more details.

it looks like that pic is of the passengers side, looking just abouve the pan line (?)

like it was said abouve, start pulling apart the pug & the vacuum lines. any wires that have the insulation melted off, will obviously need to be re-run (although the wire loom doesn't look too badly meltd) same goes for those vacuum lines, inspect & replace what's been damaged.

report back any other findings when you do this inspection of the damage.

GL with it.