Many Jeep owners wonder about their battery setup, especially when they notice strange electrical behaviors or see two battery terminals under the hood. If you drive a 2017 Jeep Cherokee, you might have asked, “Does my SUV have two batteries?”
This question matters because understanding your car’s battery system helps with maintenance, troubleshooting, and saving money on repairs. Let’s explore the 2017 Jeep Cherokee’s battery configuration, why some vehicles have two batteries, and what you should look out for.
Battery Setup In The 2017 Jeep Cherokee
The 2017 Jeep Cherokee is a popular midsize SUV. Most models come with a single 12-volt battery located in the engine bay. This battery powers the starter, ignition, lights, and accessories. However, some versions with the Start-Stop system or extra features may include a second, smaller battery.
Not every 2017 Cherokee has two batteries. The main difference comes from the trim and the optional equipment.
If your Jeep has the Start-Stop feature (where the engine turns off at red lights), it likely has a second, auxiliary battery.
Why Some 2017 Cherokees Have Two Batteries
The main reason for two batteries is the Start-Stop system. This technology improves fuel economy by shutting off the engine when the car is stopped and restarting it when you go. To do this smoothly, the vehicle uses:
- Main battery: Powers the engine and main electrical systems.
- Auxiliary battery: Keeps electronics running when the engine shuts off, and helps restart the engine quickly.
This setup prevents the main battery from draining fast and keeps your radio, lights, and air conditioning working even when the engine is off.
How To Identify If Your Cherokee Has Two Batteries
Wondering if your 2017 Cherokee has an auxiliary battery? Here are some ways to check:
- Look under the hood: The main battery is visible in the engine bay. The auxiliary battery is smaller and sometimes hidden behind plastic covers or near the wheel well.
- Check your features: If your SUV has the Start-Stop button on the dash, you likely have two batteries.
- Read the owner’s manual: The battery section will mention an auxiliary battery if your trim includes it.
- Ask a dealer: A Jeep service center can run your VIN and tell you your vehicle’s exact setup.
Where Are The Batteries Located?
The main battery in the 2017 Cherokee sits in the engine compartment, usually at the front right. The auxiliary battery is often close by but may be tucked under a plastic shield or behind the main battery.
Here’s a quick comparison:
| Battery Type | Location | Size |
|---|---|---|
| Main battery | Engine bay (front right) | Standard 12V |
| Auxiliary battery | Near main battery or wheel well | Smaller 12V |
What Happens If One Battery Fails?
If your Cherokee has two batteries and one fails, you’ll notice different problems:
- Main battery fails: The car may not start at all, or you’ll get warning lights.
- Auxiliary battery fails: The Start-Stop system stops working. The car still starts, but you may see a warning message.
Many owners don’t realize the auxiliary battery can wear out faster than the main one, especially in hot climates. If the Start-Stop system is unreliable, the small battery could be the cause.
Battery Replacement: What You Need To Know
Replacing batteries in a 2017 Cherokee with two batteries can be tricky. Often, both batteries are connected, and changing one without the other can cause electrical issues.
A few tips:
- Replace both batteries together if they’re the same age. This avoids future problems with mismatched battery health.
- Disconnect the negative terminal before working on the batteries.
- Some Cherokees require you to reset the battery monitoring system after replacement. This might need a special scan tool.
- Auxiliary batteries are smaller and less expensive, but sometimes harder to access.
Here’s a simple cost comparison:
| Battery Type | Average Replacement Cost | DIY Difficulty |
|---|---|---|
| Main battery | $120 – $200 | Easy |
| Auxiliary battery | $60 – $120 | Moderate |
Common Mistakes To Avoid
Many Cherokee owners make these mistakes:
- Ignoring the auxiliary battery: Some people don’t even know it exists until the Start-Stop fails.
- Mixing old and new batteries: This can cause charging problems.
- Using the wrong battery type: Always use batteries that meet Jeep’s specifications.
- Skipping the system reset: After battery replacement, not resetting the system can trigger error codes.
Maintenance Tips For Longer Battery Life
To keep your Cherokee’s batteries healthy:
- Drive regularly. Short trips don’t give batteries enough time to recharge.
- Check for corrosion on battery terminals.
- Get the batteries tested yearly, especially if your vehicle is over three years old.
- If you live in a hot climate, park in the shade when possible. Heat shortens battery life.
When To Seek Professional Help
If you’re unsure about battery issues, or if warning lights stay on after replacement, visit a trusted mechanic. Modern vehicles have complex electronics, and a mistake can be costly.
A professional can diagnose electrical problems and reset the system if needed.
