A well-known sport utility vehicle (SUV), the Jeep Grand Cherokee is reputed for its off-road capabilities as well as its towing capacity. However, if you own one and are planning to tow a trailer, you may run into an issue with the trailer lights not working properly.

This can be a frustrating problem, as it not only affects the safety of your towing setup but also makes it illegal to drive on the road.

In this article, we will explore the common causes of trailer light issues in the Jeep Grand Cherokee and the steps you can take to troubleshoot and fix the problem.

Whether you’re a seasoned mechanic or a first-time Jeep owner, this guide will provide valuable information to help you get your trailer lights working again.

Why Is My Jeep Grand Cherokee Trailer Lights Not Working?

If you’re experiencing issues with the trailer lights on your Jeep Grand Cherokee not working, there are several potential causes to consider.

Some of the most common reasons include the following:

1. Bad Bulb:

Check the bulbs in the trailer lights to see if any of them are burned out.

2. Towing Module Issue:

Some Jeep Grand Cherokee models have a Towing module that controls the trailer lights. If this module is malfunctioning, it could cause the lights not to work.

Towing Module Issue OF Jeep Grand Cherokee Trailer
Source:.etrailer.com

3. Bad Wiring:

Check the wiring between the vehicle and the trailer to see if there are any frayed or broken wires.

4. Bad Trailer Light Connector:

Check the trailer light connector to see if it’s corroded or damaged.

5. Blown Fuses:

Check the fuses in the vehicle’s fuse box to see if any of them are blown.

6. Trailer Brake Controller Issue:

If you have a trailer brake controller, it could malfunction and prevent the lights from working.

How to Fix Jeep Grand Cherokee Trailer Lights Not Working?

These are the quick fixes that can help you in fixing the Jeep Grand Cherokee Trailer Lights Not Working:

1. Fuses:

When experiencing trailer light issues in a Jeep Grand Cherokee, one of the first things to check is the fuses in the vehicle’s fuse box.

These fuses protect the car’s electrical circuits and can easily blow if a short circuit or overload occurs. Examine the trailer lights’ fuses and replace them if they are blown.

2. Trailer Brake Controller:

If your Jeep Grand Cherokee has a trailer brake controller, it may be malfunctioning and preventing the lights from working. Check the controller’s wiring and settings, and follow the manufacturer’s troubleshooting instructions.

3. Check Bulbs:

It’s possible that the issue is with the bulbs in the trailer lights. Check to see if any of the bulbs are burned out and, if so, replace them.

4. Wiring:

A problem with the wiring between the vehicle and the trailer is another common cause of trailer light problems. Check for frayed or broken wires and repair or replace them if you find any.

Check that all of the connections are clean and tight. Check the wiring harness as well; if it’s old and corroded, it may need to be replaced.

5. Connector:

The wiring from the vehicle to the trailer is connected by the trailer light connector. If this connector becomes corroded or damaged, the lights may stop working. Make sure the connector is clean and securely connected to the trailer.

6. Towing Module:

The trailer lights are controlled by a Towing module in some Jeep Grand Cherokee models. If this module fails, the lights may not function properly. This module is located beneath the hood and, in some cases, must be reprogrammed by a dealer.

Remember that these are only a few of the potential causes of trailer light problems in the Jeep Grand Cherokee.

If you’re not sure what’s causing the problem, consult your vehicle’s owner’s manual or take it to a qualified mechanic for assistance.

Conclusion:

There are a number of things that can go wrong with the trailer lights on your Jeep Grand Cherokee, including blown fuses, broken relays, faulty wiring, and burned-out bulbs.

The aforementioned procedures can be used to diagnose the problem and, hopefully, resolve it.

However, if the issue still persists after attempting these measures, it is recommended that you take the vehicle to a professional mechanic for further diagnosis and repair.

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