Is there a relay for the 4 wheel drive? I have a 2004 4X4 Blazer. I know there a fuse in the fuse box inside the engine compartment, but was wondering if a relay somewhere too?
I noticed when i pulled the 4x4 fuse out of the engine compartment fuse box, the fuse is NOT blown, but the pins that hold it in place look burnt/discolored.
I think I have either a bad encoder motor or TCCM. My problem is it gets stuck in 4HI if I switch it in & out of 2HI to 4HI a few times, or it will then get stuck in 2HI. the lights on the switch stay on, just nothing happens when I press the buttons. It goes in and out of 4LO with no problem.
*The only way to make it work again when it gets stuck is to disconnect and re-connect the battery.

 

After it gets stuck, do you hear clicking coming from under the dash after it gets stuck in 4wd when you try switching back to 2wd?

 

Nope, nothing. The light is still on which shows which mode its stuck in, ex: 2HI, or 2LO, but nothing happens when I press the buttons. No clicking noise, and the lights do not light up for the other buttons. Just the light remains on for the mode it is stuck in.
Once I disconnect the battery and re-connect it, then it works again and I can get it out of 4HI, or 2HI, whichever one it is stuck in.

 

try looking this over. i dont know if you have seen this or not, but it might help some where.

4x4 no worky