Your best bet to locate it is to:
1. Consult a wiring diagram: A wiring diagram specific to your truck's year and options is crucial. These diagrams show the module's location based on the circuit paths. You can often find these diagrams online through forums dedicated to Ford trucks or from a subscription service like Mitchell 1 or AllData. Look for diagrams related to the security system, body control modules (BCM), or central gateway modules – the VSM's functionality might be distributed among these.
2. Check the BCM (Body Control Module): The BCM is a central point for many vehicle functions and often houses or interfaces with security features. The location of the BCM itself is usually under the dash or in the instrument panel. It may be labeled and relatively easy to spot.
3. Search the truck's interior: Carefully look behind the glove box, under the dash, in the console, and possibly under the seats. The module may be attached to the chassis or firewall.
4. Use a scan tool: A professional-grade scan tool (like those used by mechanics) can sometimes identify the VSM's location by communicating with various modules and pinpointing its communication path.
Important Considerations:
* Integrated System: Given the year of your truck, the security system is likely highly integrated with other modules. You may not find a separate "VSM" box.
* Professional Assistance: If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic or Ford dealer. Improperly handling electrical components can cause significant damage.
Finding the exact location will require some investigation using the methods above, primarily focusing on the wiring diagrams and the location of related control modules.
