🔧 Wrangler - Battery Replacement

Replacing the battery on your Wrangler is a beginner-friendly job. The battery sits under the hood on the passenger side and is held in place by a top hold-down bracket.

Difficulty Level: Beginner | Estimated Time: 20-40 minutes

---

⚠️ Safety & Precautions

• ⚠️ Wear safety glasses and gloves. Car batteries contain acid and can spark if handled incorrectly.
• ⚠️ Always remove the negative cable first and reconnect it last. This helps prevent accidental short circuits.
• ⚠️ Do not let tools touch both battery terminals or the positive terminal and metal body at the same time.
• ⚠️ Keep open flames and cigarettes away from the battery area.
• ⚠️ The radio clock and some learned settings may reset after battery disconnection.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 13mm socket
• 3/8-inch ratchet
• 3/8-inch extension, 6-inch
• Battery terminal cleaner brush
• Battery carrier strap
• Torque wrench, inch-pound
• Safety glasses
• Nitrile gloves

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12-volt automotive battery - Qty: 1
• Battery terminal protectant spray - Qty: 1
• Battery terminal anti-corrosion washers - Qty: 2

---

📋 Before You Begin

• 🅿️ Park your Wrangler on level ground, set the parking brake, and turn the ignition off.
• 🔑 Remove the key from the ignition and keep it away from the vehicle while working.
• ⏱️ Wait at least 2 minutes after key-off before disconnecting the battery so vehicle modules can power down.
• 🧠 A battery carrier strap is a lifting handle that clips to the battery posts to help you lift the heavy battery safely.
• 🧰 A torque wrench is a tool that tightens bolts to a specific tightness so they are not too loose or too tight.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Hood and Locate the Battery

• Use the hood release inside your Wrangler, then open the hood and secure it with the prop rod.
• The battery is on the passenger side of the engine bay near the firewall.
• Use safety glasses and nitrile gloves before touching the battery.
• Take a photo before removing cables.

Step 2: Remove the Negative Battery Cable

• Find the negative terminal marked with a minus sign - and usually connected to a black cable.
• Use a 10mm socket and 3/8-inch ratchet to loosen the negative terminal clamp nut.
• Twist the clamp gently and lift it off the battery post.
• Move the cable aside so it cannot spring back and touch the battery post.

Step 3: Remove the Positive Battery Cable

• Find the positive terminal marked with a plus sign + and usually covered by a red protective cover.
• Open the red cover by hand.
• Use a 10mm socket and 3/8-inch ratchet to loosen the positive terminal clamp nut.
• Lift the positive cable off the battery post and move it aside.
• Do not let the positive cable touch any metal part of the body or engine.

Step 4: Remove the Battery Hold-Down Bracket

• The hold-down bracket keeps the battery from moving while driving.
• Use a 13mm socket, 3/8-inch extension, 6-inch, and 3/8-inch ratchet to remove the battery hold-down bolt.
• Lift the hold-down bracket out and set it aside.
• Do not lose the hold-down hardware.

Step 5: Remove the Old Battery

• Attach the battery carrier strap to the battery posts if available.
• Lift the battery straight up and out of the tray using both hands.
• Keep the battery upright. Do not tip it over.
• Set the old battery on the ground in a safe, upright position.

Step 6: Clean the Battery Tray and Cable Ends

• Use a battery terminal cleaner brush to clean the inside of both cable clamps.
• Use the battery terminal cleaner brush to clean light corrosion from the battery tray area.
• If you see white or blue-green powder, avoid touching it with bare hands because it can irritate skin.
• Make sure the tray is dry and free of loose debris before installing the new battery.

Step 7: Install the New Battery

• Use the battery carrier strap to lower the new battery into the tray.
• Make sure the positive post is on the same side as the positive cable.
• The battery must sit flat in the tray and not rock side to side.
• Install the anti-corrosion washers over the battery posts by hand if included.

Step 8: Reinstall the Battery Hold-Down

• Place the hold-down bracket back over the battery.
• Use a 13mm socket, 3/8-inch extension, 6-inch, and torque wrench, inch-pound to tighten the hold-down bolt.
• Torque to 11 Nm (95 in-lbs).
• Check that the battery cannot slide or lift.

Step 9: Connect the Positive Battery Cable

• Place the positive cable clamp onto the positive battery post.
• Push it fully down so it sits low on the post.
• Use a 10mm socket and torque wrench, inch-pound to tighten the terminal clamp nut.
• Torque to 5 Nm (45 in-lbs).
• Close the red protective cover by hand.

Step 10: Connect the Negative Battery Cable

• Place the negative cable clamp onto the negative battery post.
• Push it fully down so it sits low on the post.
• Use a 10mm socket and torque wrench, inch-pound to tighten the terminal clamp nut.
• Torque to 5 Nm (45 in-lbs).
• Spray a light coat of battery terminal protectant spray over both terminals.

Step 11: Start and Check Operation

• Start your Wrangler and confirm it cranks normally.
• Use your eyes to check that the battery cables are not loose or moving.
• Use your hands carefully to confirm the hold-down is secure, but keep hands clear of belts and fans.
• Close the hood securely.

---

✅ After Repair

• ✅ Set the clock if it reset after the battery was disconnected.
• ✅ Drive normally for a few miles while the idle and transmission learning values stabilize.
• ✅ If the check engine light stays on after installation, scan for codes before replacing more parts.
• ✅ Recycle the old battery at a parts store, recycling center, or battery seller. Do not throw it in household trash.

---

💰 DIY vs Shop Cost

Shop Cost: $220-$380 (parts + labor)

DIY Cost: $150-$260 (parts only)

You Save: $70-$120 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.6 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.