🔧 F-150 - Battery Replacement

You’ll remove the old 12V battery from the engine bay and install a new one with the correct size and rating. This restores reliable starting power and prevents low-voltage electrical issues.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

Assumption: Stock battery tray and OEM-style top-post terminals.

---

⚠️ Safety & Precautions

• ⚠️ Keep sparks/flames away; batteries can vent explosive gas.
• ⚠️ Wear gloves and safety glasses; battery acid is corrosive.
• ⚠️ Remove the negative (-) cable first and install it last to prevent accidental short circuits.
• ⚠️ Don’t let a tool touch the battery positive and metal body at the same time.
• ⚠️ Battery is heavy—lift with your legs, not your back.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• 10mm socket
• 1/4" ratchet
• 6" extension (1/4")
• 13mm socket
• 3/8" ratchet
• Torque wrench (3/8")
• Battery terminal puller (specialty)
• Wire brush battery terminal cleaner
• Fender cover
• Battery memory saver (OBD-II) (specialty)

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (Group 48/H6, top-post, AGM or flooded to match original) - Qty: 1
• Battery terminal anti-corrosion spray - Qty: 1
• Battery terminal felt washers - Qty: 2

---

📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Turn the ignition off, remove the key (if equipped), and keep all doors closed for 5 minutes so modules go to sleep.
• If you want to keep radio presets and module memory, connect a battery memory saver (OBD-II) (a small device that supplies low power through the diagnostic port).
• Open the hood and install a fender cover to protect paint.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the battery and check orientation

• Open the hood and locate the battery on the passenger side of the engine bay.
• Take a quick photo of the cables and hold-down so you can match the routing later.

Step 2: Disconnect the negative (-) battery cable

• Use a 10mm socket with a 1/4" ratchet to loosen the negative clamp nut.
• Twist the clamp gently and lift it off the negative post.
• If it’s stuck, use a battery terminal puller (specialty) (a small puller that lifts the clamp straight up without damage).
• Tuck the negative cable to the side so it cannot spring back onto the post.

Step 3: Disconnect the positive (+) battery cable

• Use a 10mm socket to loosen the positive clamp nut.
• Lift the clamp off and move it aside.
• Tip: Keep the positive end covered from metal.

Step 4: Remove the battery hold-down

• At the base of the battery, remove the hold-down bolt using a 13mm socket and 3/8" ratchet.
• Lift out the hold-down bracket and set it aside.

Step 5: Remove the old battery

• Lift the battery straight up and out. Use both hands and keep it upright.
• Set it on the ground (not on painted surfaces).

Step 6: Clean the tray and terminals

• Inspect the battery tray for debris or corrosion and wipe it clean.
• Use a wire brush battery terminal cleaner to clean the inside of both cable clamps until the metal looks bright.
• Install battery terminal felt washers on the new battery posts if you have them.

Step 7: Install the new battery and secure it

• Place the new battery into the tray in the same orientation as the old one.
• Reinstall the hold-down bracket and bolt using a 13mm socket.
• Torque to 10 Nm (89 in-lbs) using a torque wrench (3/8").

Step 8: Reconnect cables (positive first, negative last)

• Install the positive (+) clamp first and tighten with a 10mm socket.
• Torque to 6 Nm (53 in-lbs) using a torque wrench (3/8").
• Install the negative (-) clamp last and tighten with a 10mm socket.
• Torque to 6 Nm (53 in-lbs) using a torque wrench (3/8").
• Apply battery terminal anti-corrosion spray to both terminals.

Step 9: Reset the Battery Monitoring System (BMS)

• Your F-150 uses a battery monitoring strategy that may need a reset after replacement to charge the new battery correctly.
• Method A (no scan tool):
  • Turn ignition to ON (engine OFF).
  • Flash the high beams 5 times within 10 seconds.
  • Press the brake pedal 3 times within 10 seconds.
  • Watch for the battery/charging indicator to blink (if equipped). If it doesn’t, repeat once.
• Method B (scan tool):
  • Use a capable scan tool to run BMS Reset / Battery Replace for the body/charging system.

---

✅ After Repair

• Start the engine and confirm it cranks strongly and no warning lights stay on.
• Check that both battery clamps are fully seated and do not rotate by hand.
• Verify charging voltage with a meter if available (typically ~13.5–14.8V running).
• Reset the clock and restore radio presets if they were lost.

---

💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $180-$320 (parts only)

You Save: $70-$130 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 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.