How To Bypass Pcm Voltage Regulator

A voltage regulator is built in the vehicle to supply the right amount of energy of DC voltage from the bombardment to the engine. In a situation where the voltage regulator fails to control your vehicle'south voltage or some other voltage issues, what do you exercise? Tin yous bypass the voltage regulator? Aye! yous can bypass the voltage regulator on an alternator.

We will go-ahead to let you know how to bypass the voltage regulator and what you should look out for in a bad voltage regulator. Not just volition you know how to troubleshoot, just you volition also be able to know what to do to set the issue.

How to Bypass Voltage Regulator of a PCM

PCM means Powertrain Control Module and bypassing information technology can resolve the voltage issues as regards supply problem. We footstep by step guide you through making an alternator that will do the work of an external voltage regulator. The process of newly creating an alternator is in two phases – setting upwards the alternator voltage regulator and connecting the regulator.

To begin the procedure, you will need to get an aftermarket voltage regulator, regulator plug harness, and wires for connection purposes.

Phase 1: Setting up the Alternator Voltage Regulator

The steps to follow for setting upwards the alternator Voltage Regulator are –

Step 1 – Wiring Harness with the Alternator

The harness plug comes with two wires. A blue wire and a green wire. The blueish wire will be connected to the alternator while the greenish wire volition connect to the other side of the alternator plug. The cherry wire is connected to the positive side of the battery.

Your harness tin can sometimes exist two, all you need to do in this case is to connect and bring out some other wire from the blueish wire.

Here is a pro tip for yous – the red wire continued to the side of the battery should be connected to a fuse box. This is done to foreclose any possible drainage when the engine is switched off.

Footstep ii – Taping the wires

Using any adept tape, tape upwards the wires at the connection point for safe purposes. Taping the wires is to prevent confronting the wires against any leakage or fuse.

Phase ii: Connecting the External Regulator

Check out the steps to follow in connecting the external regulator to the bombardment and the ECM panel.

Stride 1 – Opening the FrontEngine Hood

The voltage regulator can just be found in the front end engine hood hence the need to open information technology. Of course, you should not open the engine hood when it is hot. Allow the engine hood to get cold because you will be working with wires so as non to burn down your easily. For amend precaution, put on manus gloves earlier yous commence the wirework.

Stride ii – Blocking all Power Sources

To block all power sources from the battery to the voltage regulator, the terminals of the battery should be disconnected.

The battery is disconnected past detaching both the positive and negative terminals of the battery.

Step 3 – Locate the Voltage Regulator

Locating the voltage regulator is the next stride to take after disconnecting the battery terminals. It volition be found near the voltage regulator fastened to the vehicle computer panel. One time y'all can locate the vehicle computer panel, check for a rectangular-shaped socket. Inside the socket, there volition be four visible connected wires it. The alternator is to exist connected with the voltage regulator wire coming out in the socket.

Stride 4 – Mounting the External Alternator

Using bolt screws, mountain the alternator voltage regulator on the inner fender or on the firewall. Make sure to utilize one sail metal screw for grounding.

Stride five – Connectedness of the Wires to the Alternator Voltage Regulator

The light-green wire coming out from the alternator should now exist connected to the lesser post to the voltage regulator. The green wire should then laissez passer on to the acme post of the voltage regulator. The greenish wire is an output voltage of 12V from a key switch of 12 volts.

Cut off the bad wires that were connected earlier and isolate them with taping. They are no longer needed.

Footstep 6 – Connecting a Fuse Box to the Voltage Regulator Switch

Using a voltmeter, find out the 12V fundamental switch from the switchboard console'south back. The fuse box connection can not be done unless the 12V fundamental switch is found.

Put a fuse and hook it upward into the bottom slot of the switch box.

Step 7 – Connect the Wire with the Battery

The red wire should at present be connected to the battery's positive terminal. The grounding wire coming out of the alternator regulator should become to any ports on the voltage regulator.

At this point, you have completed the bypassing of the PCM voltage regulator.

We promised to permit you know how to cheque for a bad voltage, read on. Here are some of the signs you should check out for in a bad voltage;

Clusters may cease running properly
Check for flashing battery lite or bank check engine low-cal dimming
Gauge showing an inaccurate reading
Check the volt gauge for the voltage readings. Bank check for sudden depression or high voltage
There might exist a complete no voltage reading sometimes

Upon noticing whatever of the above-listed symptoms of a bad regulator, check your voltage regulator immediately. The fault could be traced to the gauge system.

How to Exam Voltage Regulator

A multimeter is used for testing the Voltage Regulator. Follow the steps highlighted beneath to test for the voltage regulator

Step 1 – Connect the Multimeter

The multimeter comes with two wires. A red and a black wire. To connect your multimeter with the engine bombardment, connect the red wire to the positive final of the battery. And connect the black wire of the multimeter to the negative last of the battery.

When you are done connecting the multimeter to the bombardment, switch on the ability of the multimeter. The power is switched on past turning the knob towards the voltage (V) DC.

Step two – Start the Engine

Start the engine to get the voltage reading on the multimeter screen. The multimeter should read around 12.6 volt

Stride 3 – Increase the Engine Power

To bank check if the voltage is increasing with an increment in rpm, the fuel power should be increased and set idle from 1500 – 2000 rpm. If information technology increases with an increased rpm, it just ways ane thing. That the voltage regulator needs replacement or repair.

If the voltage is found to not exceed 12 volts but instead is noticed to exist decreasing. It translates to mean that, the battery is unable to provide a proper power supplement or perchance the alternator is not getting an acceptable charge.

In this case, it could only mean that whatever of the connections are rusty or loosened and take failed to supply the proper voltage. Troubleshoot past checking all the terminals connecting the bombardment to the voltage regulator.

If the voltage reading remains on or around 12.6 volts. It indicates that the voltage regulator is in perfect working condition and so the problem should be the battery or the judge.

If the voltage regulator upshot won't resolve past whatever of the in a higher place methods. And so you lot should go for an installation of an external voltage regulator featherbed. This should resolve entirely the voltage issues.

"How to Bypass Voltage Regulator of a GM PCM?", is ane most oftentimes asked questions. We will for the sake of this commodity answer it.

How to Featherbed Voltage Regulator of a GM PCM

In the case of a voltage regulator failure in a GM, it is non practical to only consider replacing the failed regulator with a new one. In a typical GM voltage regulator, when the ignition switch is turned on, current flows through the fuses of the gauges through the battery light and also through the brown wire to the plug on the side/back of the engine.

In one case the engine is perfectly running and developing output, the regulator looks internally to bank check out for system voltage. When it is working well, it puts the complete organisation voltage back out on the brownish wire. With the aforementioned voltage on both sides, information technology turns off.

A failed diode is also a common fault of a GM voltage regulator. Once one fails, you volition be able to become only about one-third of the unit'southward rated current, I.e the ripple voltage will exist very high. Zener diodes are usually used to counter the issue of a high ripple voltage when it happens.

Related thought: engine power reduced

Final word

This article is written in so many details, that it could and so easily pass for a complete transmission guiding you lot through the bypassing procedure of a PCM voltage regulator. All you need to practice is consciously follow the steps highlighted above.

We will like to know if this article gave answers to your questions on how to bypass the PCM voltage regulator. Did you try using the steps in this article? Did they help resolve the bug you had with your voltage regulator?

Source: https://vehicleic.com/how-to-bypass-pcm-voltage-regulator/