Where is the voltage Regulator located on my van

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Regardless of parts store listings... Starting in 1987 for Dodge and Chrysler and 1991 for Jeep, MOST of these vehicles have externally regulated alternators .. that are controlled by the Alternator Voltage Control Module *inside* the Engine Control Unit, ECU (computer) . This is often called the ECC, ECM, EEC, or PCM. Often, especially after installing a high output alternator, the alternator voltage control module *inside* the ECU will fail , leaving you with a dead charging system where your external regulator alternator doesn't work , or doesn't work the way it should , yet your engine runs fine, however the entire ECU would need replacement. Many have had to replace the computer several times just to get the alternator working again... Copy and paste the YouTube link @ bottom of this page... Good luck!