2006 Dodge Dakota 4x4 SLT Body Control Module location
I have a manual for a 2004 Dakota that is probably similar to the 2006 electrically. Dodge never called it a Body Control Module; earlier models did have the Central Timer Module (CTM) which functioned like Body Control Modules in other manufacturers vehicles.
In 2004, the CTM was replaced by the Integrated Power Module (IPM), which consists of the Front Control Module and Power Distribution Center, and is located next to the battery on the left inner fenderwell (the Front Control Module is underneath the Power Distribution Center, where you will find relays and fuses). There are several other modules which control various functions, and they communicate with each other through the Programmable Communication Interface (PCI) bus circuit, also called J1850.
The Front Control Module controls all exterior lights, except brake lights and turn signals, and the windshield wiper functions. Other modules (PCM, TCM, antilock brakes, heated seats, instrument cluster, power locks/power windows/power mirrors, etc) control other functions, but all communicate through the PCI bus.