why does my Ford F-150 13th Generation (2015-2020) battery die when parked for a few days?

Ford F-150 13th Generation (2015-2020)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

509 words

Problem Statement

Learn how to diagnose and fix battery drain issues in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and tools required.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow engine to cool before touching components.

Symptoms

•Battery warning light illuminated on the dashboard
•Difficulty starting the engine after a few days of inactivity
•Dim or weak headlights when attempting to start
•Electrical components (e.g., radio, lights) malfunctioning or turning off
•Battery age is over three years

Diagnostic Steps

1
Check Battery Condition: Use a multimeter to measure the battery voltage; a healthy battery should read around 12.6 volts or higher.
2
Inspect Battery Connections: Examine battery terminals for corrosion or loose connections that may hinder performance.
3
Perform Parasitic Draw Test: Disconnect the negative battery cable and connect an ammeter in series to measure the current draw; it should be below 50 milliamps.
4
Check for Faulty Components: Identify any components that may remain powered while the vehicle is off, such as the radio, interior lights, or aftermarket accessories.
5
Scan for Diagnostic Trouble Codes: Use an OBD-II scanner to check for any codes that might indicate electrical issues or system malfunctions.

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

•Multimeter
•Ammeter
•Socket set
•Wire brush

Parts Required

•Battery cleaner (if necessary)
•Replacement battery (if the current one is faulty)

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Diagnostic Steps

1
Check Battery Condition: Use a multimeter to measure the battery voltage; a healthy battery should read around 12.6 volts or higher.
2
Inspect Battery Connections: Examine battery terminals for corrosion or loose connections that may hinder performance.
3
Perform Parasitic Draw Test: Disconnect the negative battery cable and connect an ammeter in series to measure the current draw; it should be below 50 milliamps.
4
Check for Faulty Components: Identify any components that may remain powered while the vehicle is off, such as the radio, interior lights, or aftermarket accessories.
5
Scan for Diagnostic Trouble Codes: Use an OBD-II scanner to check for any codes that might indicate electrical issues or system malfunctions.

Solution

1. Preparation

Gather tools and parts: multimeter, ammeter, socket set, and battery cleaner.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Safety Warning: Disconnect the battery before working on electrical systems.

2. Battery Condition Assessment

Sub-step 1: Measure the voltage using a multimeter. If the voltage is below 12.4 volts, consider charging or replacing the battery.
Sub-step 2: Clean any corrosion on battery terminals with a battery cleaner and a wire brush.
Sub-step 3: Tighten any loose connections to ensure good electrical contact.

3. Parasitic Draw Resolution

Sub-step 1: Disconnect the negative battery cable and connect the ammeter.
Sub-step 2: Monitor the current draw. If it exceeds 50 milliamps, proceed to the next step.
Sub-step 3: Identify the components causing excess draw by removing fuses one at a time until the draw drops below the acceptable level.
Sub-step 4: Repair or replace any faulty components, such as a malfunctioning relay or aftermarket accessory.