why does my Ford Explorer Fifth Generation (2011-2019) battery keep dying?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

543 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix battery drain issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms and solutions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before inspecting or replacing components.

Symptoms

•Check engine light illuminated
•Battery warning light on the dashboard
•Difficulty starting the engine
•Electrical accessories malfunctioning or behaving erratically
•Battery terminal corrosion observed
•Short lifespan of new batteries

Diagnostic Steps

1
Scan the vehicle’s OBD-II system for error codes related to the battery or charging system.
2
Inspect the battery terminals and cables for corrosion, loose connections, or damage.
3
Measure the battery voltage with a multimeter to determine if the battery is holding a charge.
4
Check the alternator output voltage while the engine is running to ensure it is charging properly.
5
Perform a parasitic draw test to identify any components that may be drawing excess current when the vehicle is off.
6
Examine fuses and relays for any that may be malfunctioning, causing electrical drain.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Wire brush
•Socket set
•Serpentine belt tool
•Ammeter

Parts Required

•Replacement battery (if necessary)
•Replacement alternator (if necessary)

Related Faults

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Diagnostic Steps

1
Scan the vehicle’s OBD-II system for error codes related to the battery or charging system.
2
Inspect the battery terminals and cables for corrosion, loose connections, or damage.
3
Measure the battery voltage with a multimeter to determine if the battery is holding a charge.
4
Check the alternator output voltage while the engine is running to ensure it is charging properly.
5
Perform a parasitic draw test to identify any components that may be drawing excess current when the vehicle is off.
6
Examine fuses and relays for any that may be malfunctioning, causing electrical drain.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a safe, well-ventilated area.
Disconnect the negative battery terminal to prevent electrical shock.

2. Address Battery and Connections

Inspect and Clean Terminals:
- Use a wire brush to clean corroded battery terminals.
- Ensure terminals are tightly connected to battery posts.
Replace Battery if Necessary:
- If the battery voltage is below 12.4 volts, consider replacing it.
- Use a battery of the same specifications (e.g., Group Size 65).

3. Inspect and Repair Alternator

Test Alternator Output:
- Reconnect the negative terminal and start the engine.
- Measure voltage at the battery. It should range between 13.7 to 14.7 volts.
Replace Alternator if Faulty:
- If output is below specifications, remove the alternator by:
  - Disconnecting the negative battery terminal again.
  - Removing the serpentine belt using a belt tensioner tool.
  - Unplugging electrical connectors and removing mounting bolts.
  - Installing a new alternator and reconnecting all components.

4. Perform Parasitic Draw Test

Identify Excess Current Draw:
- Connect an ammeter in series with the negative battery terminal.
- Monitor the draw; it should typically be below 50 mA.
Locate and Repair Faulty Components:
- If the draw is excessive, systematically pull fuses to identify the circuit causing the drain.
- Repair or replace any faulty components (e.g., an interior light remaining on, malfunctioning modules).