To help you figure out where it goes, I need more details:
* What kind of hose is it? Is it a rubber hose, a metal line, or something else? Describe its diameter and the material. A picture would be extremely helpful.
* What fluid is in the hose (or was in it)? Is it brake fluid (usually clear or light amber), power steering fluid (usually reddish), or something else? This is a major clue.
* Where is the disconnected end located? Be as specific as possible. Is it near the differential, the wheel hub, the steering knuckle, etc.?
* Which axle is it on? (Passenger side or driver's side)
* Does the hose have any markings or numbers on it?
Possible Candidates (with important safety notes):
* Brake Lines: If it's brake fluid, DO NOT DRIVE THE TRUCK. A brake line leak is extremely dangerous. Get it repaired immediately by a qualified mechanic.
* ABS Lines: These are part of the Anti-lock Braking System and usually have a smaller diameter than main brake lines. Again, a leak here impacts braking, so get it repaired professionally.
* Power Steering Lines: If it's power steering fluid, a leak will eventually lead to loss of power steering. It's still important to get this fixed but less immediately dangerous than a brake line leak.
* Other hoses: There might be other less common hoses near the axle.
Finding the Connection:
Once you provide the information above, I can try to give you a better idea. In the meantime, you can try:
1. Trace the hose: Carefully follow the path of the hose to see where it might go. Look for a matching fitting or connection point.
2. Consult a repair manual: A repair manual specific to your 1994 Ford F-150 4x4 will have diagrams of the front axle and its components. You can find these online or at auto parts stores.
3. Search online: Search for images of the front axle of a 1994 Ford F-150 4x4. Comparing your hose to the images might reveal its location.
Remember: Safety first! If you're not comfortable working on your vehicle's brakes or steering system, take it to a qualified mechanic. Improper repair could lead to serious injury or damage.
