I took my blazer to the trail for the first time yesterday. When I got to the first obsticle I had to turn arround when I started to climb arround the first rock my rear driver side wheel started spinning. I put it back in two wheel drive and started spinning out in the same spot as when I was in 4 low. Where should I check first. It doesn't have manual locking hubs, ant the lights dont come on on the indicators either.

 

I don't know why my sig isn't coming up but its an 87 S-10, 2.8 EFI

 

Where you engaging 4lo correctly? You did not state if 4Hi works.

 

Tried 4 hi and low, no front drive on either. 4 low puts the rear into low though. I couldn't find any linkage near the hubs is it engeged at the diff? is it vaccume or electric. if its vaccume where does it come from?

 

its vacume, i dont know aobut an 87, but a 95 its under the batterie, mybe that might help you

 

well that was easy! The vacume line had fallen off the actuator. Wish I found that at the trail. The indicator lights still dont work though.

 

were was it located?

 

right next to the battery. front of the pass. side wheel well.

 

4lo rocks!