Why Does My Jeep Wrangler Blower Motor Not Working? (5 Solutions)

The Jeep Wrangler Blower motor plays a crucial role in keeping the cabin warm and comfortable for you. It has many other benefits too. So we do not like it when the motor fails or malfunctions. However, things don’t always turn out as we expect them to.

A Jeep Wrangler blower motor can fail in a number of ways, and there can be many reasons for it. The reasons include, but are not limited to, blown fuse, faulty resistor, bad relay, bad connector, and faulty motor.

In the rest of the article, we aim to provide a detailed analysis of these reasons, how you can fix them, and how you can prevent blower motor failure. Keep reading to find out more.  

Why Does The Jeep Wrangler Blower Motor Not Working?

Just like any other motor, the Jeep Wrangler blower motor requires electricity to run. When there is a flaw in the electrical distribution system or the necessary parts that help the vehicle maintain a steady flow of electricity are damaged, the blower motor will fail.

As long as the blower motor is concerned, you must pay attention to the fuse, the blower motor relay, and the resistor of the jeep wrangler. If any of these is blown or damaged, you will have to deal with the blower motor issue. Here is a list of common reasons: why the Jeep Wrangler blower motor is not working.

  • Voltage Imbalance
  • Faulty Relay and Fuse
  • Faulty Resistor
  • Faulty Blower Motor
  • Poor wiring connection
  • Faulty Climate Control Unit 

5 Fixing Strategy To Solve Jeep Wrangler Blower Motor Failure:

We have briefly mentioned the reasons behind the jeep wrangler blower motor failure. Here we will describe each in more detail: how each reason works behind the failure and the symptoms for the particular reason. Let’s get to the point without wasting time.

1. Voltage Imbalance: Replace the Fuse 

The fuse ensures the steady flow of electricity. It is a metal wire that blows or burns when a strong current passes through it. When the fuse related to the blower motor is blown, the blower motor fails, interrupting the flow of electricity and damaging the motor circuit.

For Jeep Wrangler models from 2006 to 2018, the engine compartment fuse block is located in front of the battery on the passenger side. It has two tabs. Just pull on them and click to open them up. 

The best idea is to open your manual, which has a detailed diagram, description, and location of a particular fuse. You can also search online, in which you may find a detailed description, including images, or a video explanation of the fuse block of any particular model.

When it comes to the blown fuse, replace it with a new fuse. The fuse should have the same amperage as the previous one. On the other hand, you don’t have to worry about the cost, which is negligible.

 2. Faulty Relay: Replace the Relay 

If the respective fuse is fine, there is a chance that the relay is bad. A relay is an electromagnetic switch used in a vehicle to automate the power switching of an electric circuit. Bad relay can be one of the reasons for Jeep wrangler blower motor failure.

Some Jeep Wranglers may not have the relay for the front blowers. In that case, it is controlled by the TIPM or AC control circuit board. Again, you do the same: check the vehicle’s manual to ensure everything about it.

The manual has detailed information, including a wiring diagram, the location of the relay, and a relevant description of how to solve it. For your convenience, the Jeep Wrangler relay box is in front of the battery on the passenger side. 

The cost of the Jeep Wrangler relay is somewhere between $70 and $80, of which a partial amount is for the mechanic and around $30 for the cost of the relay.

3. Faulty Resistor: Replace the Resistor

A resistor is a crucial part of the blower motor on the Jeep Wrangler. When the motor fails, this is an important place to look into. The resistor controls the blower motor’s speed, sending different signals to the motor.

Each resistor has a resistance that controls the electric power that runs through the motor, which in turn limits the speed of the wrangler blower motor. When the resistance is maximum, the speed is maximum too, and vice versa.

The first approach to solving the bad resistor issue is to find the resistor in the vehicle and test it to see if it is faulty. If the test shows the resistor has an issue, then you have to replace the resistor. Before we show how to test a resistor, let’s see the reasons behind the resistor failure.

  • Overheated or if the resistor is shocked 
  • Due to excessive resistance 
  • Sometimes humidity increases the resistance 
  • Normal wear if used for a long time
  • Other issues, including worn particles, cause a short circuit

4. Fault in the Motor: Replace the Motor

Inconsistency in air flow or the sound from the motor is an early sign the blower motor is faulty. The most obvious symptom will be that the air is not coming after the motor is switched on.

More specifically, if you want to know that the motor is faulty, you must test it the same way you tested the resistor. Check the manual for a detailed description before starting the testing procedure.

Use a multimeter to check the resistance. Place the probes of the multimeter in the connector and read the resistance. If the resistance is in the predetermined range, then the motor is fine. If not, then the motor is faulty. 

When the motor is damaged, you have nothing to do but replace the motor. Again check the manual and necessary tutorial from the internet on how to replace the motor. 

Replacing the motor is a costly fix, a bit of a complicated job to be done on your own. If you are not confident, seek help from your dealer if you have the warranty or let it be handled by an expert. 

5. Poor Wiring Issue and Connector

As we have stated about different electrical elements, including fuses, resistors, or the motor itself, they are not separate units but are connected through wire and connector. 

If anything is loose or damaged, it will disrupt the electrical flow and lead to motor issues. Inspect all the wires and connectors and take the necessary steps.

You must also check the climate control unit. It is the main center, so any fault here can be a reason for the blower motor failure.

How to Test the Blower Motor Resistor? 

If the motor failure is not due to a bad fuse and relay, it is probably due to the bad resistor. So, by checking the resistor, you will be sure the fault is due to a bad resistor. This is a step-by-step guide you must follow.

Step 1: Find the Location Of the Resistor

Find the location of the resistor. You can get the details from the manual. It has all the necessary information.

Step 2: Inspect the Area 

Visually inspect the area for any physical damage, if the resistor is melted, or if there is any overheated connector.

Step 3: Use Multimeter and Check the Reading

Now you have to check the resistance of the connector. To check the resistance, you need a multimeter. The probes of the multimeter have to be placed in the right place. One is at the output terminal of the resistor, and the other is at the resistor’s input terminal.

You can get the guidelines from the manual or from an expert. After you have placed the probes in an appropriate place, read the reading on the multimeter. If it is around 12V, then the resistor is fine.

If the reading is as expected, the resistor is fine, and the fault is somewhere else. Most probably, the motor itself is damaged.

FAQs.

By now, you are probably informed about the reasons behind the Jeep Wrangler Blower Motor failure. Still, there is always more to learn. Here are a few more important questions that you might want to know.

How Do I Know If My Wrangler’s Blower Motor Resistor Is Bad?

Before you check the resistor, certain signs tell you the resistor is bad. The symptoms include the fan only working at high speed, the switch being on but the air not coming through the vents, and the inconsistent flow of air.

If The Resistor Of The Wrangler Is Damaged, What Will The Resistor Do?

Like any other resistor, the main purpose of the blower motor resistor is to change the air pressure. When you find the air pressure of the Wrangler’s blower motor is pretty consistent, or there are no changes in the pressure, the resistor is faulty for sure.

Is It Expensive To Replace The Blower Motor In A Jeep Wrangler?

When it comes to the cost of replacing a motor, it is a bit higher compared to replacing a fuse, relay, or resistor. The cost of the motor is around $300, and the cost of labor is between $100 -$150. 

All in all, the average cost of replacing the Jeep Wrangler blower motor is $350 to $450. There may be some hidden charges that may increase the cost.

What Is The Reason Behind The Jeep Wrangler Not Blowing Hot Air?

There are specific parts responsible for producing hot air. If anything goes wrong with them, your motor will not produce hot air. The common faulty parts responsible for this issue are the heater, thermostat, and the wrangler blower motor resistor.

Conclusion 

Therefore, we think you already know almost everything there is to know about the Jeep Wrangler’s problems. You can, however, broaden your search and learn more about it. We believe the information we shared was helpful.

Although the blower motor has nothing to do with how the Wrangler runs, it serves important purposes. So, as soon as you trace an inconsistency in the airflow, you must know that it is due to a faulty blower motor.

Since solving the issue requires testing and inspecting different electrical components, it is best to let an expert do the job. If you are confident and have previous experience, you can follow a DIY approach to solve the issue.

Related Posts: