Where is RAP module on 2005 ford E-250?

There's no standard "RAP module" in a 2005 Ford E-250. The term RAP (Remote Anti-theft Passive) is usually associated with the system that controls features like remote unlocking and keyless entry. The functionality is spread across several modules in a Ford E-250, not a single dedicated RAP module.

The key components involved in this system are likely integrated into the:

* Body Control Module (BCM): This is the primary module controlling most of the vehicle's electrical systems, including the locking mechanisms and remote keyless entry. This is the most likely location for the core logic of what you'd think of as a "RAP module".

* GEM (Generic Electronic Module): Depending on the specific features and options on your E-250, the GEM might handle some aspects of the remote entry system.

* Anti-theft module: This module handles the immobilizer and alarm system functions that are intertwined with the remote unlock system.

To diagnose issues with your remote unlocking or anti-theft system, you'll need to consult a Ford E-250 repair manual or a qualified mechanic familiar with Ford vehicles' electrical systems. They can use a scan tool to access diagnostic trouble codes (DTCs) that will pinpoint the malfunctioning module or component. There is no single location to look for a "RAP module."