What does a RAP module do in 98 Ford Explorer?

In a 1998 Ford Explorer, the RAP module stands for Remote Anti-theft Personnel. It's the brains of the keyless entry system. It receives signals from the key fob, and based on the programmed codes, it controls functions like:

* Unlocking/Locking doors: The primary function. It activates the door lock actuators.

* Arming/Disarming the alarm: When the car is locked, it arms the alarm system. Unlocking disarms it.

* Trunk release: Some systems allow trunk release via the key fob, controlled by the RAP module.

* Panic alarm: Holding down a button on the key fob will trigger the horn and lights (panic alarm).

Essentially, the RAP module acts as an intermediary between the key fob and the car's security and locking mechanisms. If it malfunctions, you'll likely have problems with any or all of the key fob's functions.