Breather line?

[phybere]

At the beginning of my stock intake, before the air filter, there's a small rubber hose that runs out of the pipe, and down through the engine bay towards the bottom (looks like it originally ran down near the front differential/transfer case somewhere). Currently it's not connected to anything.
Is this a breather line for something (for the front diff, maybe?) Can anyone tell me where this gets hooked up?

 

[Robin Hood]

EDIT. thinking of wrong thing

 

[rags]

No hoses on a 94 go from the engine to a diff, If its the one i'm thinking it is it goes to the fuel tank purg canister ( I think thats what it's called ) that bolts to the radiator support between the battery and the radiator. There should be 1 hose going to the throttle body and 1 or 2 larger hoses that follow the frame back.

 

[MAKG]

The EEC line isn't before the air filter. It's connected to the throttle body. The only thing before the filter is the blend door. It's vacuum and air-temperature activated.