where is the voltage regulator?

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The voltage Regulator Is Internal in the PCM(Powertrain Control Module)/Computer. The PCM turns the alternator on and off depending on how much voltage is needed. I would check your battery first. A dead cell can throw off the regulator cause its trying to charge a battery that won't take it. Also check all the Battery cable connections and grounds especially at the block any bad connections will throw it off to. Because the pcm sees low voltage Which in turn puts the alt. to full output also can cause it to burn up from over output. PCM is located dead center above engine.CHARGING SYSTEM OPERATION
The charging system consists of:

Generator
Electronic Voltage Regulator (EVR) circuitry within the Powertrain Control Module (PCM)
Ignition switch (Refer to Ignition System for information)
Battery (Refer to Battery for information)
Battery temperature sensor
Generator Lamp (if equipped)
Check Gauges Lamp (if equipped)
Voltmeter (Refer to Instrument Panel and Gauges for information)
Wiring harness and connections (Refer to Wiring for information)
The charging system is turned on and off with the ignition switch. When the ignition switch is turned to the ON position, battery voltage from the powertrain control module (PCM) is supplied to the generator rotor to produce a magnetic field. This is done through one of the two field terminals at the rear of generator.

The amount of DC current produced by the generator is controlled by the EVR (field control) circuitry contained within the PCM. This circuitry is connected in series with the second rotor field terminal and ground.

A battery temperature sensor, located in the battery tray housing, is used to sense battery temperature. This temperature data, along with data from monitored line voltage, is used by the PCM to vary the battery charging rate. This is done by cycling the ground path to control the strength of the rotor magnetic field. The PCM then compensates and regulates generator current output accordingly.

All vehicles are equipped with On-Board Diagnostics (OBD) All OBD-sensed systems, including EVR (field control) circuitry, are monitored by the PCM. Each monitored circuit is assigned a Diagnostic Trouble Code (DTC) The PCM will store a DTC in electronic memory for certain failures it detects. Refer to On-Board Diagnostics in Group 25, Emission Control System for more DTC information.

The Check Gauges Lamp (if equipped) monitors: charging system voltage, engine coolant temperature and engine oil pressure. If an extreme condition is indicated, the lamp will be illuminated. This is done as reminder to check the three gauges. The signal to activate the lamp is sent via the CCD bus circuits. The lamp is located on the instrument panel. Refer to Instrument Panel and Gauges for additional information. This is from a chrysler factory manual.
7 months ago...Show more

each and every of the LM79xx sequence regulators are for a unfavourable output voltage. replace the xx including your chosen voltage, and do a seek. So case in point you like a regulator with a -12V output. seem for an LM7912 voltage regulator....Show more

I just checked on the following auto-parts sites: partstrain.com, rockauto.com and autopartswarehouse.com and there was no mention of an external voltage regulator as an accessory electrical part. I assume the regulator is internal....Show more

Not to discredit you, but I think the regulator is internal on that model....Show more

on the passenger side by the front fender looking in from the front of the engine.. a little black square thing....Show more