Question about 1988 Dodge Dakota

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Trying to locate voltage regulator as bateery won't stay charged

Trying to locate the voltage regulator on 1988 v-6 dodge dakota. battery won't stay charged. dah alternator checked and was told it had an external reulator. the parts stores have them but no one can tell me where to find it on the truck, as i have looked for what they say it is. thanks for any help.

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Posted on Jul 07, 2009

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Maybe someone took yours...?
That would explain the problem. Ask to look at the voltage regulator in the parts store so you know what it looks like. Shouldn't be too hard to find then. Probably on the rear of the engine compartment.

Posted on May 20, 2009

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1 Answer

1991 Dodge Dakota electrical problem I have replaced Alternator still will not charge where do I start from here


When you replaced the alternator, did you also replace the voltage regulator? I have read that on this truck, the voltage regulator is internal to the ECU and is located on the firewall near the ignition coil. You may be able to install a separate, dedicated voltage regulator available at your local auto parts store. Please note that you may have to rewire from the ECU connector to the stand-alone voltage regulator. Good luck.

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I own a 97 dodge dakota sport v8 magnum with a 318 its having problems holding a charge , i've replaced the alternator the belt and the battery , still won't hold a charge to the alternator


1997 DODGE DAKOTA CHARGING SYSTEM
OPERATION:
The amount of amperage produced by the alternator is controlled by the Electronic Voltage Regulator (EVR) circuitry within the Powertrain Control Module (PCM)
EVR circuitry is connected in series with the alternator field driver terminal and ground. A Battery Temperature Sensor (BTS), located in the battey tray under the battery, is used to sense battery temperature.
Sensed battery temperature and data from monitored line voltage is used by the PCM to adjust the battery charging rate. This is accomplished by cycling the ground path to control the strenght of the alternator magnetic field.
The PCM then compensates and regulates alternator amperage output accordingly.
If a problem is sensed in a monitored circuit, a Diagnostic Trouble Code (DTC) will be stored in PCM memory and the Malfunction Indicator Light (MIL) (commonly refered to as the "check engine light") will be illuminated, providing certain criteria have been met.
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When diagnosing any problem concerning the charging system on this vehicle, it is recommended that you begin by scanning the PCM for fault codes in order to eliminate certain possibilities and provide a more accurate and timely diagnosis.
If you have any fault codes pertaining to your charging system, please post them in a reply on this page and I will be happy to guide you through the diagnosis process.

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1 Answer

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Check the Voltage Regulator, and how old is the battery, Check the cells in the battery. If battery is 3 years or older replace.

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Double check all connections are clean & tight. You need to get a voltmeter and have the voltage tested at battery with engine off & running. Drive it to the Napa shop you bought the alternator from if necessary, they should perform test free of charge, as the possibility of a faulty one is not out of the question, provided all is connected properly. Did you check that a main fuse for alternator wasn't blown in Uunderhood power distribution box?

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1 Answer

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The source I checked says it's located under the hood, driver side, rear engine area on firewall (V-8 engines) Let me know how u make out.

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the computer acts as a voltage regulator. it may be going bad

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