Where is the RAP module located on a 2002 Ford Explorer Sport Trac?

There isn't a standardized module specifically called "RAP" (Remote Anti-Theft Password) in a 2002 Ford Explorer Sport Trac, or most vehicles for that matter. The anti-theft system's components are integrated into other modules. The functions related to what you might be thinking of as a "RAP" module are likely handled by the body control module (BCM).

The BCM's location varies slightly depending on trim level and options, but it's typically found under the dashboard, on the driver's side. You'll probably need to remove some trim panels to access it. A repair manual for your specific year and model will show the precise location and how to access it.

If you are having issues with your keyless entry or remote start, the problem likely resides within the BCM, not a separate RAP module. A mechanic or a detailed wiring diagram might be necessary to diagnose problems more precisely.