Battery

This procedure covers the removal and replacement of the 12-volt battery in a 2011-2014 Ford F-150 with the 3.5L EcoBoost engine.

Warnings

Tools required

Parts

• Group 65 automotive battery (850+ CCA recommended for EcoBoost) × 1 — Motorcraft BXT-65-850 or equivalent
• Battery terminal anti-corrosion washers (if corroded) × 2 — Use OEM specification

Preparation

1. Ensure the vehicle is parked on level ground with the engine off and cool
2. Turn off all electrical accessories including lights, radio, and climate control
3. Remove the key from the ignition
4. If using a memory saver, connect it to the cigarette lighter or OBD-II port now
5. Open the hood and secure it with the prop rod

Procedure

1. 1

   Disconnect negative battery terminal
   Using a 10mm socket, loosen the negative (-) battery terminal bolt. Do not remove the bolt completely; just loosen it enough to lift the cable off the battery post. Carefully lift the negative cable away from the battery terminal and position it away from the post to prevent accidental contact.
2. 2

   Disconnect positive battery terminal
   Using a 10mm socket, loosen the positive (+) battery terminal bolt. Lift the positive cable off the battery post. If a red terminal cover is present, remove it first. Position the cable away from the battery.
3. 3

   Remove battery hold-down bracket
   Locate the battery hold-down bracket that secures the battery to the tray. Using a 13mm socket and extension, remove the hold-down bolt that secures the bracket. The bolt threads into the battery tray at the base. Remove the hold-down bracket and set aside.
4. 4

   Remove battery from tray
   Carefully lift the battery straight up and out of the battery tray. The battery weighs approximately 45-50 lbs. Use proper lifting technique and get assistance if needed. Set the old battery aside on a stable surface.
5. 5

   Clean battery tray and terminals
   Inspect the battery tray for corrosion, dirt, or debris. Clean the tray with a wire brush or baking soda solution if corrosion is present. Dry thoroughly. Clean both battery cable terminals with a battery terminal cleaner or wire brush to remove any corrosion and ensure good electrical contact.
6. 6

   Install new battery
   Place the new battery into the battery tray, ensuring it is oriented correctly with the positive terminal on the passenger side and negative terminal toward the driver side. The battery should sit flush in the tray with no movement.
7. 7

   Install battery hold-down bracket
   Position the hold-down bracket over the battery. Insert the hold-down bolt through the bracket and thread it into the battery tray. Tighten the bolt to specification using a torque wrench. The bracket should secure the battery firmly without over-compressing the battery case.
   Torque spec

   Battery Hold-Down Bolt8 Nm (6 lb-ft)
8. 8

   Connect positive battery terminal
   Place the positive (+) cable terminal onto the positive battery post. Ensure the terminal is fully seated on the post. Using a 10mm socket and torque wrench, tighten the terminal bolt to specification. Do not overtighten as this can damage the terminal or battery post.
   ⚠Terminal bolts strip easily. Use a torque wrench and do not exceed 6.0 Nm (4.0 lb-ft).
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
9. 9

   Connect negative battery terminal
   Place the negative (-) cable terminal onto the negative battery post. Ensure the terminal is fully seated. Using a 10mm socket and torque wrench, tighten the terminal bolt to specification. The connection should be firm but not over-torqued.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
10. 10

    Apply terminal protection and verify installation
    If desired, apply battery terminal protectant spray or anti-corrosion washers to both terminals to prevent future corrosion. Verify both terminals are secure and cannot be moved by hand. Ensure the hold-down bracket is tight and the battery does not shift in the tray.

Reassembly

1. Remove any memory saver device if used
2. Ensure all tools are removed from the engine bay
3. Close the hood securely

Verification

• Turn the ignition to the ON position (do not start) and verify dash lights illuminate properly
• Start the engine and verify it cranks and starts normally
• Check that all electrical systems function correctly (windows, radio, lights, climate control)
• Verify no warning lights are present on the instrument cluster beyond normal startup indicators
• If equipped with electronic features requiring relearning (power windows, throttle body), perform relearn procedures per Ford service procedures
• Check battery voltage with a multimeter: should read 12.4-12.8V with engine off, 13.5-14.5V with engine running

Related trouble codes on this vehicle

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