It's got a vacuum hose and a connector with two wires. What's it for?

Looks like it should be bolted somewhere. Currently I zipped tied it out of harms way. Where does it go?

This is a 1995 4wd Blazer. I don't think the 4wd locks in.

 

Looks like a simple vacuum switch, like something that might turn on your 4x4 light when the front axle engages. Check the underhood vacuum hose diagram and see if you can find it there. Otherwise, maybe you can see what color the wires are and find it on a wiring diagram.

 

Its part of the anti lock brake system - disables part of the anti lock system when in 4WD - I've seen them bolted to firewall and even wheel wells - find a spot that works and bolt it down .....

 

Thanks!