how to troubleshoot electric power steering problems in Ford F-150?

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

541 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 electric power steering problems in Ford F-150. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Steering

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent short circuits.

Symptoms

•Steering wheel feels heavy or unresponsive
•"Power Steering" warning light illuminated on the dashboard
•Noise from the steering column when turning
•Intermittent loss of power steering assist
•Difficulty steering at low speeds
•Increased steering effort required

Diagnostic Steps

1
Check for any stored trouble codes using an OBD-II scanner.
2
Inspect the EPS fuse and relay for continuity and proper operation.
3
Verify the battery voltage and electrical connections to the EPS motor.
4
Inspect the steering column for any physical obstruction or damage.
5
Test the EPS motor using a multimeter to check for proper voltage and ground.
6
Check the vehicle's power steering fluid level and condition (if applicable).

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
•Screwdrivers
•Torque wrench

Parts Required

•EPS fuse (if blown)
•EPS relay (if faulty)
•EPS motor (if necessary)

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Diagnostic Steps

1
Check for any stored trouble codes using an OBD-II scanner.
2
Inspect the EPS fuse and relay for continuity and proper operation.
3
Verify the battery voltage and electrical connections to the EPS motor.
4
Inspect the steering column for any physical obstruction or damage.
5
Test the EPS motor using a multimeter to check for proper voltage and ground.
6
Check the vehicle's power steering fluid level and condition (if applicable).

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace EPS Fuse

Locate the fuse box (refer to the owner's manual for the exact location).
Remove the cover and identify the power steering fuse.
Remove the fuse and check for continuity using a multimeter.
If the fuse is blown, replace it with a new fuse of the same amperage.

3. Check EPS Relay

Locate the EPS relay in the fuse box.
Remove the relay and test it for continuity.
If the relay is faulty, replace it with a new one.

4. Inspect Electrical Connections

Examine the wiring harness and connectors leading to the EPS motor for signs of wear or damage.
Clean any corrosion from connectors and ensure all connections are secure.
Repair or replace damaged wiring as necessary.

5. Test and Replace EPS Motor (if needed)

Reconnect the battery and turn the ignition to the "ON" position without starting the engine.
Use a multimeter to check the voltage at the EPS motor connector.
If the voltage is correct but the motor does not operate, the EPS motor may need to be replaced.
Remove the motor by disconnecting the electrical connector and unbolting it from the steering column.
Install the new EPS motor and reconnect the electrical connector.