1998 Jeep Cherokee Alternator Wiring Diagram

Are you having issues with your Jeep Cherokee’s alternator? Do you need assistance with wiring it correctly? In this article, we will be discussing the 1998 Jeep Cherokee alternator wiring diagram, step-by-step instructions, and frequently asked questions about the process. So, let’s dive in!

Understanding the Alternator

Before moving on to the wiring diagram, let’s understand the function of the alternator. The alternator is a crucial component of the Jeep’s electrical system. It is responsible for providing power to the battery and charging it while the engine is running. An alternator works on the principle of electromagnetic induction, where it converts mechanical energy into electrical energy.

A Jeep Cherokee’s alternator typically has three wires: the output wire, the ground wire, and the field wire. The output wire is responsible for carrying the electrical power generated by the alternator to the battery to charge it. The ground wire ensures the alternator has a stable reference voltage, while the field wire is responsible for regulating the alternator’s output voltage.

The 1998 Jeep Cherokee Alternator Wiring Diagram

Now that we understand the basics let’s move on to the wiring diagram. Below is the step-by-step guide to wiring your 1998 Jeep Cherokee alternator:

Wire Color Function
Black/Orange Output Wire
Black/Light Blue Ground Wire
Dark Green Field Wire

Step 1: Disconnect the Battery

Before starting any wiring work, it is imperative to disconnect the battery to prevent any short circuits or electrical hazards. Locate the car battery and disconnect the negative terminal. It is usually identified by a minus (-) sign next to it.

Step 2: Locate the Alternator

The alternator is usually located at the front of the engine, close to the battery. Locate it and inspect it for any damages or loose connections.

Step 3: Identify the Wires

Once you have located the alternator, identify the three wires connected to it: The output wire, the ground wire, and the field wire. These wires might be color coded or identified by markings.

Step 4: Disconnect the Wires

Disconnect the three wires connected to the alternator carefully. Label them individually to avoid confusion while re-connecting them later.

Step 5: Connect the New Wires

Take the new wires and connect them to the alternator’s output, ground, and field terminals. Ensure you connect the wires to the correct terminals to avoid damage to the alternator or electrical system.

Step 6: Reconnect the Battery

After connecting the wires correctly, reconnect the battery by connecting the negative terminal to prevent any electrical hazards.


1. What is the most common cause of alternator failure in Jeep Cherokee?

The most common cause of alternator failure in Jeep Cherokee is worn-out bearings. These bearings can cause the alternator to produce unusual noises or fail to produce enough current. Regular maintenance can help prevent alternator failure.

2. Can I use a higher amp alternator for my Jeep Cherokee?

Yes, you can use a higher amp alternator, but it is not necessary unless you have installed additional accessories that require more power. An alternator with a higher amp rating can lead to battery overcharging and damage to the electrical system if not correctly calibrated.

3. Can I repair my Jeep Cherokee alternator myself?

Yes, you can repair your Jeep Cherokee alternator yourself if you have the necessary knowledge and tools for the job. However, if you are not confident in your ability to repair it, seek professional assistance to avoid causing more damage and additional costs.

4. How long does a Jeep Cherokee alternator last?

A Jeep Cherokee alternator lasts anywhere between 80,000 – 150,000 miles, depending on the usage and maintenance. Regular maintenance, such as cleaning, can increase the lifespan of the alternator.

5. How do I know my Jeep Cherokee alternator is failing?

You can identify failing Jeep Cherokee alternators by observing warning signs such as dimming headlights, strange noises, or a burning smell. If you notice these signs, have your Jeep’s alternator inspected by a professional.


Correctly wiring your 1998 Jeep Cherokee alternator is vital to ensure it works correctly and efficiently. Follow the step-by-step instructions provided in this article, and you’ll have no issues with the wiring. Regular maintenance and inspection can significantly increase the lifespan of the alternator and prevent issues in the future. If you have any further questions or concerns, seek professional assistance.