No Power To Trailer Plug Chevy- Why & How To Fix?

A functioning trailer plug is crucial for regular Chevy owners who travel or transport equipment. When there is no power to the trailer plug, it can be frustrating and disrupt your plans.

A blown fuse is one of the leading causes of no power to the trailer plugs on a Chevy. The fuse is responsible for powering the trailer plug, which may have blown due to a short circuit or overloading. 

In this blog post, we will explore some of the common causes behind a lack of power to the trailer plug on a Chevy and provide potential solutions to help you troubleshoot and resolve the issue quickly.

Common Causes Of No Power To Trailer Plug In Chevy 

Common Causes Of No Power To Trailer Plug In Chevy 

When encountering a situation where there is no power to the trailer plug in a Chevy vehicle, several potential causes could be responsible for the issue. 

Here are some common causes that may result in a lack of power to the trailer plug:

Blown Fuse

One of the most frequent causes of no power to the trailer plug is a blown fuse. Check the fuse box for any blown fuses related to the trailer or towing circuit. If a blown fuse is found, replace it with a correct rating fuse.

Faulty Wiring

Faulty or damaged wiring can lead to power loss in the trailer plug. Inspect the wiring harness and connections for any signs of damage, such as frayed or broken wires, loose connections, or corrosion. Repair or replace any damaged components as necessary.

Trailer Wiring Harness Issues

If the problem persists after checking the vehicle’s wiring, examine the trailer wiring harness. Look for any damaged or broken wires, loose connections, or corrosion. Repair or replace the trailer wiring harness if any issues are detected.

Faulty Trailer Plug

The trailer plug itself may be faulty, causing a lack of power. Inspect the plug for any signs of damage or corrosion. If necessary, replace the trailer plug with a new one that matches the vehicle’s specifications.

Trailer Brake Controller Malfunction

If the Chevy vehicle is equipped with a trailer brake controller, a malfunction in this component can affect power delivery to the trailer plug. 

Check the brake controller for any error codes or unusual behavior. Consult the vehicle’s manual or contact a professional for further assistance.

Incorrect Trailer Wiring Setup

Ensure that the trailer is wired correctly and matches the vehicle’s wiring configuration. Incorrect wiring setups can lead to power issues. Refer to the vehicle and trailer manuals to verify the proper wiring connections.

Vehicle-Specific Issues

Different Chevy models may have unique electrical systems or towing setups. It is advisable to consult the vehicle’s manual or contact a dealership or qualified mechanic for specific troubleshooting steps related to your Chevy model.

Steps To Fix A Chevy No Power To Trailer Plug?

Steps To Fix A Chevy No Power To Trailer Plug?

There are several steps you can take to troubleshoot and fix this issue. Follow the steps below to address the problem and restore power to your trailer plug.

Check The Fuse Box:

  • Locate the fuse box in your Chevy vehicle, usually found under the dashboard or in the engine compartment.
  • Open the fuse box and look for the fuse labeled “trailer” or “trailer tow.” Check if the fuse is blown or damaged.
  • If the fuse is blown, replace it with a new one of the same amperage rating.

Inspect The Wiring Connections

  • Ensure the trailer plug is securely connected to the wiring harness on your vehicle.
  • Examine the wiring harness for any signs of damage, such as frayed wires or loose connections.
  • If you notice any issues, repair or replace the damaged wiring or connectors as necessary.

Test The Trailer Plug With A Multimeter

  • Set the multimeter to the voltage testing mode.
  • Insert the multimeter probes into the corresponding slots of the trailer plug while it’s connected to your Chevy.
  • Check if the multimeter displays any voltage reading. A reading of 12 volts indicates a proper power supply.

Verify The Vehicle’s Towing Package

  • Consult your Chevy vehicle’s manual or contact the manufacturer to confirm if your vehicle is equipped with a towing package.
  • Some models may require additional wiring or fuses to enable power to the trailer plug. Install any missing components if necessary.

Visit A Certified Mechanic

  • If you have followed the above steps and are still unable to restore power to the trailer plug, it is advisable to seek assistance from a certified mechanic.
  • They have the expertise and specialized equipment to diagnose and fix any underlying electrical issues that may be causing the problem.

Maintaining The Trailer Plug And Electrical System

One important aspect of owning a Chevy vehicle is properly maintaining its trailer plug and electrical system. Here are some tips for maintaining the trailer plug and electrical system of your Chevy:

Regular Inspection

It’s essential to inspect the trailer plug and electrical connections regularly. Look for any signs of damage, such as corrosion, loose wires, or worn-out insulation. Ensure that all connections are secure and free from debris.


Keep the trailer plug clean by periodically removing any dirt, grime, or moisture that may have accumulated. You can use an electrical contact cleaner and a soft brush to clean the plug and socket gently.


Apply a small amount of dielectric grease or electrical contact lubricant to the trailer plug’s terminals and pins. This helps prevent corrosion and ensures good conductivity.

Test the Lights

Before each towing session, test all the lights connected to your Chevy’s electrical system, including brake lights, turn signals, and taillights. Replace any bulbs that are not working.

Wiring Harness

Inspect the wiring harness that connects to the trailer plug. Look for any frayed or damaged wires and replace them as necessary. Ensure that the harness is securely attached to your Chevy’s frame.

Trailer Battery

If your trailer has a separate battery, check its condition regularly. Clean the battery terminals and apply an anti-corrosion solution to prevent build-up. Ensure that the battery is securely mounted.

Fuse Check

Verify that the fuses related to the trailer’s electrical system are in good condition. Replace any blown fuses promptly with the correct amperage rating.

Frequently Asked Question

There are several common causes for this issue, but luckily, there are solutions available. Here are some frequently asked questions (FAQs) regarding this problem:

How to Determine if the Fuse is the Issue?

Check the Fuse Box: Look for a blown fuse related to the trailer plug. Replace it with the appropriate amperage rating. If the new fuse also blows, further investigation may be needed.

What to Do with a Faulty Wiring Connection?

Inspect the Wiring Harness: Look for loose or damaged wires between the vehicle and the trailer plug. Repair or replace any faulty connections to restore power to the plug.

Testing the Trailer Plug for Defects: How to Do It?

Use a Multimeter: Check for voltage at the trailer plug terminals while the vehicle’s electrical system is turned on. If no voltage is detected, the trailer plug may need replacement.

Could a Malfunctioning Trailer Brake Controller Be the Cause?

Yes, a Faulty Brake Controller Can prevent power from reaching the trailer plug. Verify the brake controller’s functionality and ensure it is properly wired and calibrated.


If you’re experiencing a lack of power to your Chevy trailer plug, several common causes exist. These include blown fuses, faulty wiring connections, damaged trailer plugs, or a malfunctioning vehicle electrical system. 

To resolve the issue, check and replace any blown fuses, inspect the wiring for damage, repair or replace faulty connections, and seek professional assistance if needed. 

Ensuring a proper power supply to your trailer plug is essential for a safe and functional towing experience.

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