99 Blazer ATC short/stuck in 4Low

[truckin99]

Hi All, my '99 Blazer is stuck in 4WD low and doesn't shift gears at all. I have the automatic transfer case and was using auto-4WD at the time when it did this. The ATC fuse in the engine relay panel fries anytime the key is on. Inside, the electronic shifting display shows nothing lit up and doesn't react to anything. The fuse fries even with the truck in neutral. Seems to be a major short.

The problem happened after pulling out of a parking space and putting in it park. I heard some gear grinding, so maybe the transfer case is jammed in the locked position? Can only go around 10mph max now. Sounds like it needs to be taken apart, but if any of you have suggestions I'd appreciate it.

[autoengine]

I have the same problem with my 97 Blazer -happened right after I replaced the vacuum swith on the transfer case. I hope someone out there knows what's up.

Incidentally, where is this ATC fuse located? where is the relay panel?

[truckin99]

Yeah I noticed your thread after I had posted mine. There's a 20 amp fuse in the engine block relay panel. On my blazer it's on the driver side just under the hood with a small plastic cover. The fuse is marked under the cover as ATC. Good luck with yours. I'm having mine towed to the dealership today. I'll try to post what the problem is if I have time.

[truckin99]

Well the dealership people seemed to have an idea right away as to what the problem was. Ended up needing what I believe they called an encoder motor. It's basically responsible for engaging/disengaging four wheel drive. Hope this helps.

[autoengine]

That helps a lot. How much were the damages if I may ask?