how to troubleshoot a bad alternator in Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

518 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 troubleshoot and fix a bad alternator in a Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

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 opening any components.

Symptoms

•Check engine light illuminated
•Dimming or flickering dashboard lights
•Electrical accessories malfunctioning
•Battery warning light on the dashboard
•Difficulty starting the engine
•Frequent battery discharges or dead battery

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for alternator-related codes.
2
Measure battery voltage with a multimeter (should be between 12.6V to 12.8V when fully charged).
3
Start the engine and measure the voltage again (should be between 13.7V to 14.7V).
4
Inspect the alternator belt for wear, cracks, or looseness.
5
Check the alternator connections for corrosion or loose wiring.
6
Test the alternator output with a load tester to ensure it meets specifications.

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
•Socket set
•Torque wrench
•Battery terminal cleaner

Parts Required

•New alternator
•Serpentine belt (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for alternator-related codes.
2
Measure battery voltage with a multimeter (should be between 12.6V to 12.8V when fully charged).
3
Start the engine and measure the voltage again (should be between 13.7V to 14.7V).
4
Inspect the alternator belt for wear, cracks, or looseness.
5
Check the alternator connections for corrosion or loose wiring.
6
Test the alternator output with a load tester to ensure it meets specifications.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, battery terminal cleaner.
Disconnect the negative battery cable using a socket to prevent electrical shorts.
Allow the engine to cool before working on the alternator.

2. Remove the Alternator

Access the Alternator: Remove any components obstructing access (e.g., engine cover, air intake duct).
Remove the Belt: Use a wrench to relieve tension on the serpentine belt tensioner. Slide the belt off the alternator pulley.
Disconnect Wiring: Carefully disconnect the electrical connectors from the alternator, noting their positions.
Unbolt the Alternator: Use a socket set to remove the mounting bolts securing the alternator to the engine. Keep the bolts for reinstallation.

3. Inspect and Clean

Inspect Alternator: Check the alternator for any physical damage or signs of wear.
Clean Connections: Use a battery terminal cleaner to remove any corrosion from the alternator terminals and connectors.

4. Install New Alternator

Position New Alternator: Align the new alternator in place and insert the mounting bolts. Tighten to the manufacturer’s specification (typically around 37 lb-ft).
Reconnect Wiring: Attach the electrical connectors securely to the new alternator.
Reinstall Belt: Reposition the serpentine belt over the alternator pulley and use the tensioner to apply proper tension.

5. Final Checks

Reconnect the negative battery cable and ensure all tools are removed from the engine bay.
Start the engine and check for proper operation of the new alternator.