Where is the pcm for the regulator and alternator located on the 03 dodge 2500 turbo diesel?
Driver side of the engine block.
The voltage regulator is NOT built in the alternator, it is part of the ECM, that is the Engine Control Module. The module (computer) monitors the charging system and signals the alternator how much voltage to send it to keep the system working properly. the voltage regulator is built in to the alternator