How to Bypass Pcm Voltage Regulator

Last Updated on February 9, 2023 by Ryan

There are a few ways to bypass the PCM voltage regulator. One way is to use a resistor in series with the field terminal of the alternator. This will cause the alternator to charge at a lower voltage, which will prevent the PCM from shutting it off.

Another way is to disconnect the field terminal of the alternator from the battery. This will allow the alternator to continue charging even if the PCM shuts it off.

  • Remove the PCM voltage regulator from the vehicle
  • Place a jumper wire between the positive and negative terminals on the PCM voltage regulator
  • Connect a voltmeter to the jumper wire, and measure the voltage output of the regulator
  • If the voltage output is within specifications, then the regulator is functioning properly and no further testing is necessary
  • If the voltage output is outside of specifications, then the regulator needs to be replaced

How to make a External Voltage Regulator to Bypass a Dodge computer, ECM

Can You Bypass a Voltage Regulator?

A voltage regulator is an electrical device that regulates the voltage in a circuit. It is used to maintain a constant voltage level in an electronic circuit. Voltage regulators are used in a wide variety of electronic devices, including computers, cell phones, and other electronic equipment.

There are two main types of voltage regulators: linear and switching. Linear voltage regulators work by dissipating excess power as heat, while switching regulators use transistors to convert excess power into another form (usually light or sound). It is possible to bypass a voltage regulator, but doing so can damage the electronic device or cause it to malfunction.

Bypassing a linear voltage regulator will cause the regulator to overheat and eventually fail. Bypassing a switching regulator can damage the transistor(s) used to convert excess power into another form.

Does the Pcm Control the Voltage Regulator?

No, the PCM does not control the voltage regulator. The voltage regulator is controlled by the engine’s ECU.

Does the Pcm Control the Alternator Voltage?

The PCM, or powertrain control module, is the central computer that controls all of the engine’s functions in a modern car. It does not directly control the alternator voltage, but it indirectly affects it by controlling the engine speed. The higher the engine speed, the higher the alternator voltage will be.

So if you are having problems with your alternator voltage, it could be due to a problem with your PCM.

Will an Alternator Work Without a Regulator?

An alternator is a device that converts mechanical energy into electrical energy, typically using rotating coils of wire called armature windings. A regulator controls the output of the alternator to ensure that it does not exceed a predetermined voltage limit. Without a regulator, an alternator can produce voltages high enough to damage electronic devices or cause fires.

How to Bypass Pcm Voltage Regulator


Gm Voltage Regulator Bypass

Gm voltage regulator bypass is a simple and effective way to improve the performance of your alternator. It involves installing a higher output voltage regulator in place of the stock unit. This allows your alternator to generate more power, which can be used to charge your battery more efficiently or run accessories that draw a lot of power.

The most common reason to install a voltage regulator bypass is to improve the charging system in a car with an aftermarket stereo system. If you have installed powerful amplifiers and subwoofers, they can draw a lot of power from your battery, causing the voltage to drop too low. This can cause your headlights to dim or flicker when you turn on your stereo.

Bypassing the voltage regulator will allow your alternator to provide enough power to keep your lights bright while still providing plenty of juice for your stereo system. Another reason to use a voltage regulator bypass is if you are having trouble getting your car started in cold weather. A lower output voltage from your alternator can make it harder for your starter motor to turn over in cold temperatures.

Bypassing the voltage regulator will give your alternator a boost, making it easier for your engine to start on those chilly mornings. Installing a GM voltage regulator bypass is relatively simple and can be done with just basic hand tools. You’ll need to disconnect the negative terminal from your battery before starting work.

Once that’s done, locate the two wires that connect the stock voltage regulator to the Alternator Voltage Regulator Connector (AVRC) on the back of the alternator. Cut these wires and strip back about ½ inch of insulation from each end. Next, take the new GM VRB1205L high output voltage regulator and connect it in place of the stock unit using the same wire connections.

Dodge Voltage Regulator Bypass

If your vehicle has been having electrical issues, you may need to bypass the voltage regulator. This is a simple process that anyone can do with just a few tools. First, you’ll need to locate the voltage regulator.

It’s usually located near the battery, but it could be in other places depending on your vehicle. Once you’ve found it, disconnect the positive and negative terminals. Next, take a wire and connect the positive terminal to the positive terminal on the battery.

Do the same for the negative terminal. This will bypass the voltage regulator and send power directly from the battery to whatever needs it. Be sure to check all of your connections before starting your vehicle to avoid any accidents or further damage.

With this easy fix, you should be able to get back on the road in no time!

Chevy Voltage Regulator Bypass

If you own a Chevy and it’s time to change the voltage regulator, there are a few things you need to know. First, what is a voltage regulator and why do you need to change it? A voltage regulator controls the amount of electricity that flows from the battery to the alternator.

Over time, the regulator can wear out and cause problems with your electrical system. That’s why it’s important to change it when it starts to show signs of wear. Second, how do you know when it’s time to change the voltage regulator?

There are a few symptoms that can indicate that your Chevy needs a new voltage regulator. If you notice dim headlights or flickering interior lights, this could be a sign that the voltage regulator isn’t working properly. Additionally, if your car stalls or has trouble starting, this could also be due to an issue with the voltage regulator.

Third, where can you get a new voltage regulator for your Chevy? You can purchase them at most auto parts stores or online retailers. Be sure to get one that’s specifically designed for your make and model of vehicle.

Fourth, how do you install the new voltage regulator? The process is actually pretty straightforward. Just follow the instructions in your owner’s manual or look up a tutorial online for guidance.

With these four steps in mind, changing your Chevy’s voltage regulator should be no problem!


If your car’s engine is having trouble starting in cold weather, it could be because the PCM voltage regulator is not working properly. Bypassing the PCM voltage regulator is a relatively simple process that can be done at home with a few tools. First, you will need to remove the battery and disconnect the negative terminal.

Next, locate the PCM voltage regulator and remove the two wires that are connected to it. Finally, connect the positive wire from the battery directly to the positive terminal on the voltage regulator and reconnect the negative terminal. Your car should now start without any issues in cold weather.


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