If you’re driving a 2015 Jeep Grand Cherokee and notice that your heating or air conditioning isn’t working right, the blower motor relay might be the culprit. This small but vital part controls the power to your blower motor, which pushes air through your vents.
When it fails, you could face no airflow, weak air, or a fan that won’t stop running. Imagine being stuck on a hot Texas day with no AC or freezing in winter because your blower won’t work properly. Knowing how to spot a faulty blower motor relay can save you time, money, and frustration.
You’ll learn the key signs of a bad relay, simple ways to test it yourself, and what to do next to get your Jeep’s climate control back in top shape. Keep reading to protect your comfort and your ride.
Credit: bymed.com.ar
Symptoms Of A Faulty Relay
The blower motor relay in a 2015 Jeep Grand Cherokee controls the power to the blower motor. A faulty relay can cause several issues with the HVAC system. Recognizing the symptoms early helps avoid further damage and ensures comfort inside your vehicle. Below are common signs that indicate a bad blower motor relay.
No Airflow From Vents
The most obvious symptom is no air coming from the vents. The blower motor may not receive power due to relay failure. This stops airflow completely, affecting heating and cooling.
Intermittent Fan Operation
The fan may turn on and off randomly. This happens because the relay connection is unstable or weak. Intermittent operation makes cabin temperature control difficult.
Fan Running Continuously
The blower fan might run nonstop even when the vehicle is off. A stuck relay can cause constant power flow to the motor. This drains the battery and causes unnecessary wear.
Weak Airflow Output
Air coming from the vents may feel weak or less powerful. A failing relay can reduce voltage to the blower motor. This lowers the fan speed and airflow strength.
Clicking Or Buzzing Sounds
Unusual clicking or buzzing noises near the relay area may occur. These sounds indicate electrical issues inside the relay. It signals that the relay contacts are failing or stuck.
Fan Working Only On Certain Speeds
The blower fan might work only at specific speed settings. A faulty relay can affect the speed control circuit. This results in limited fan speed options and reduced comfort.
Credit: bymed.com.ar
Locating The Relay
Locating the blower motor relay in your 2015 Jeep Grand Cherokee is a simple task. Knowing its position helps you fix blower motor issues quickly. The relay controls the power to the blower motor, so finding it is key to troubleshooting.
This guide breaks down the steps to locate the relay easily. Start by finding the fuse box, then identify the blower motor relay inside it.
Finding The Fuse Box
The fuse box in the 2015 Jeep Grand Cherokee is under the hood. Open the hood and look near the driver’s side. It is a black box with a snap-on cover.
Remove the cover carefully. Inside, you will see rows of fuses and relays. The cover often has a diagram showing each fuse and relay’s function. This helps to find the blower motor relay faster.
Identifying The Blower Motor Relay
Inside the fuse box, look for a small rectangular relay. The cover’s diagram labels each relay. Find the one marked “Blower Motor” or “HVAC.”
The blower motor relay is usually near other HVAC system relays. It may be labeled with a number or letter on the diagram. If unsure, check your vehicle’s owner manual for the exact relay location.
Testing The Relay
Testing the blower motor relay in your 2015 Jeep Grand Cherokee helps find issues with the HVAC system. The relay controls power to the blower motor. If it fails, the blower may stop working or run intermittently.
Follow simple steps to test the relay and confirm its condition. Use basic tools and your senses to check for signs of relay problems. This process avoids unnecessary replacements and saves time.
Listening For Relay Click
Turn the ignition on and set the blower fan to a low speed. Place your ear near the relay inside the fuse box. Listen carefully for a clicking sound. A click means the relay is switching power properly. No click may indicate a faulty relay or wiring issue.
Checking For Heat Or Burnt Smell
After running the blower for a few minutes, carefully touch the relay case. It should be warm but not hot. A very hot relay may be failing or overloaded. Also, sniff for any burnt or electrical odor near the relay. Burnt smells often point to relay damage or short circuits.
Jumping The Relay Terminals
Remove the relay from its socket. Use a small jumper wire to connect the relay’s control terminals. This action mimics the relay activating. If the blower motor runs during this test, the relay is likely bad. If the blower does not run, the problem may be elsewhere in the circuit.
Tools Needed For Repair
Repairing the blower motor relay on a 2015 Jeep Grand Cherokee requires the right tools. Having these tools ready makes the process easier and faster. The tools help test the relay, replace it, and keep you safe during repair. Below are the main tools you will need for this task.
Basic Testing Tools
A multimeter is essential to test the relay’s electrical function. It measures voltage, resistance, and continuity. A test light can also help check if the relay gets power. Basic screwdrivers and pliers will assist in removing panels and the relay itself. These simple tools ensure you can diagnose the problem before replacing parts.
Replacement Relay Options
Choose a replacement relay that matches your Jeep’s specifications. OEM relays guarantee proper fit and function. Aftermarket relays can be more affordable but verify quality before purchase. Keep a spare relay on hand to avoid delays in repair. Having the right replacement part ready saves time and effort.
Safety Equipment
Wear safety glasses to protect your eyes from dust and debris. Use gloves to avoid cuts and electrical shocks. Disconnect the battery before starting work to prevent accidents. Safety gear ensures the repair goes smoothly and reduces injury risks.
Step-by-step Relay Replacement
Replacing the blower motor relay in your 2015 Jeep Grand Cherokee is a simple task. This step-by-step guide helps you do it safely and correctly. Follow each step carefully to restore your vehicle’s blower motor function.
Disconnecting The Battery
Start by opening the Jeep’s hood. Locate the battery and use a wrench to loosen the negative terminal clamp. Remove the clamp and set it aside. This step prevents electrical shocks and protects the vehicle’s electronics during the repair.
Removing The Faulty Relay
Find the blower motor relay in the fuse box. It usually sits near the HVAC controls. Gently pull the old relay straight out. Avoid using excessive force to prevent damage to the fuse box or nearby components.
Installing The New Relay
Take your new relay and align the pins with the slots in the fuse box. Press it firmly into place until it clicks or feels secure. Double-check the fit to ensure it is seated properly for optimal performance.
Reconnecting The Battery
Return to the battery and reattach the negative terminal clamp. Tighten it securely with the wrench. Close the hood and start your Jeep. Test the blower motor to confirm the relay replacement was successful.
Troubleshooting After Replacement
After replacing the blower motor relay on your 2015 Jeep Grand Cherokee, some checks help ensure everything works correctly. Troubleshooting is important to confirm the fan runs smoothly. These steps can save time and avoid further damage.
Verifying Fan Operation
Turn on the ignition and set the fan to different speeds. Listen carefully for any noise or changes in airflow. The fan should respond instantly to speed changes. If the fan does not start or works only at one speed, the relay might still have issues.
Checking Related Fuses And Wiring
Inspect the fuse box for any blown fuses related to the blower motor. Use a test light or multimeter to check fuse continuity. Also, examine wiring connections for corrosion, loose ends, or breaks. Damaged wiring can prevent proper relay function, causing fan problems.
When To Consult A Professional
If the fan still fails to work after these checks, professional help is needed. Mechanics have the tools to diagnose complex electrical issues. They can test the relay, wiring, and blower motor thoroughly. This ensures the problem gets fixed safely and correctly.
Buying The Right Relay
Choosing the right blower motor relay for your 2015 Jeep Grand Cherokee is important. The relay controls the power to the blower motor, affecting your vehicle’s heating and cooling. Picking the wrong one can cause poor performance or damage. This guide helps you understand your options and make a smart buy.
OEM Vs Aftermarket Relays
OEM relays come from the original manufacturer. They match the exact specs of your Jeep’s parts. OEM parts tend to last longer and fit perfectly. Aftermarket relays are made by other companies. They can be cheaper but quality varies. Some aftermarket relays work well, but others may fail sooner. Choosing OEM offers peace of mind. Aftermarket may save money but check reviews carefully.
Price Range And Where To Buy
Blower motor relays for the 2015 Jeep Grand Cherokee usually cost between $10 and $50. OEM relays are often at the higher end. Aftermarket ones fall in the lower to mid price range. You can buy relays at auto parts stores, online retailers, or Jeep dealerships. Online shops often offer better prices and delivery options. Check for return policies and warranties before buying.
Ensuring Compatibility
Not all relays fit every Jeep model. Check your vehicle’s manual or part number to confirm the right relay. Look for relays designed specifically for the 2015 Jeep Grand Cherokee. Using the wrong relay can cause electrical issues or fail quickly. Verify voltage, pin layout, and size before purchase. If unsure, ask a mechanic or parts expert for help.
Credit: www.youtube.com
Read Also:
2012 Jeep Wrangler Light Bar 2
How to Safely Put Jeep in Neutral With Dead Battery
Frequently Asked Questions
How Do I Know If My Blower Motor Relay Is Bad?
A bad blower motor relay causes no airflow, weak or inconsistent fan operation, or constant running. Listen for clicking sounds. Test relay by supplying power; no power flow or overheating indicates failure. If fan won’t run after bypass, check motor or wiring.
Where Is The Blower Motor Relay Located?
The blower motor relay is usually located in the vehicle’s fuse box under the dashboard or hood. Check your owner’s manual for the exact location.
Where Is The Blower Motor In A 2015 Jeep Grand Cherokee?
The blower motor in a 2015 Jeep Grand Cherokee is located behind the glove box on the passenger side. Access requires removing the glove box.
What Is The Recall On The 2015 Jeep Grand Cherokee?
The 2015 Jeep Grand Cherokee recall addresses possible electrical issues affecting the blower motor relay. This can cause inconsistent HVAC operation or no airflow. Jeep urges owners to check recall status and get repairs free at authorized dealers for safety and proper function.
Conclusion
The 2015 Jeep Grand Cherokee blower motor relay plays a key role in your vehicle’s comfort. A faulty relay can cause weak or no airflow from the vents. Checking for clicking sounds or inconsistent fan speeds helps spot problems early.
Replacing a bad relay is often simple and restores proper function. Regular care keeps your HVAC system working well. Stay aware of symptoms to avoid bigger issues later. Your Jeep will thank you with a cool, comfortable ride every time.