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Ford Edge Front Turn Signal Light Bulb Replacement Guide
How to change a burnt out front turn signal light bulb in the headlight of a 2nd generation 2015 to 2018 Ford Edge SUV.

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Paul B. Michaels
Author & Photographer
Auto Mechanic Since 1989

2017 Edge Headlight
Loosen Plastic Screw
Pull Out Plastic Fastener
This automotive maintenance tutorial was specifically written to assist owners of the second generation 2015, 2016, 2017, 2018 and probably also the updated 2019, 2020, 2021 and 2022 model years of the Ford Edge SUV in changing the front turn signal light bulb located in the headlight housing.

Owners of other Ford and Lincoln vehicles such as the Escape, Expedition, EcoSport, Flex, Explorer, Fiesta, Focus, Fusion, Mustang, Taurus, Ranger, Transit Connect, F-150, Endura, C-Max, Kuga, Mondeo, MKZ, Navigator, Aviator, Nautilus and Continental may also find these DIY instructions to be helpful.

The compatible replacement light bulb part number is 7440NA (also known as 7440A or WY21W).

If you would like to have brighter front turn signals, install some 7440NA LED bulbs.

The tools needed to complete this procedure include a Phillips head screwdriver, a 10mm socket and a 1/4" or 3/8" drive ratchet.


Bolt On Outer Edge
Loosen Counterclockwise
Inner Bolt Removed
The first two steps are to open the hood and then move to the side of the vehicle with the burnt out front turn signal bulb.

To access the turn signal bulb socket on the underside of the housing, you'll have to fully remove it from the engine bay and detach it from the front bumper cover.

(If you need to change the low beam or high beam headlight bulbs, please take a look at my DIY tutorial for the procedure at the following link: 2015-2019 Ford Edge Headlight Bulbs Replacement Guide.)

Locate the small black plastic screw near the rear outer edge of the housing.

Loosen the plastic screw by turning it in the counterclockwise direction with a Phillips head screwdriver.

Once the screw has been released, you can pry out the base of the plastic fastener with your finger nail or use a plastic pry bar tool.

Then remove the black metal bolt near the inner edge of the housing by turning it in the counterclockwise direction with a 10mm socket and a 1/4" or 3/8" drive ratchet.

(The inner bolt is longer than the outer bolt.)

Set the bolt aside in a safe place.

Remove Outer Bolt
Outer Bolt Removed
Lift Housing Up & Out
Remove the black metal bolt at the outer edge of the housing by turning it in the counterclockwise direction with a 10mm socket and a ratchet.

(The outer bolt is slightly shorter than the inner bolt.)

Set the bolt aside in a safe place.

To not mix up the two bolts, I recommend placing the outer bolt on the plastic cowl near the windshield on the outer edge and place the longer inner bolt closer to the middle of the cowl so that you can easily remember their positions.

Carefully lift the headlight housing up and out of the engine bay.

If you have trouble removing the headlight, you may need to gently wiggle the housing to release it from the front bumper cover.

Pull Up Inner Edge
Headlight Housing Removed
Turn Signal Bulb Socket
Try to avoid using excessive force.

The headlight assembly should pop out relatively easily.

Turn over the housing to access the round black plastic front turn signal light bulb socket located on the underside.

1/4 Turn Counterclockwise
Bulb Socket Removed
Pull Out Old Light Bulb
Rotate the bulb socket 1/4 turn in the counterclockwise direction before pulling it straight out.

Carefully pull the old light bulb straight out of the socket.

If you have trouble removing a stuck or stubborn light bulb, put on some rubber gloves and carefully wiggle the bulb back and forth while pulling it straight out.

Try to avoid using excessive pressure on the old bulb.

(I once had an old bulb pop in between my fingers and cause a few cuts.)


Old Light Bulb Removed
Push In New Light Bulb
Empty Bulb Housing
The original OEM light bulb was marked as part number WY21W 12V21W.

Push a new amber colored number 7440NA light bulb straight into the socket.

If you would like to have brighter front turn signal lights that will also last a lot longer, install some compatible replacement 7440NA LED bulbs.

1/4 Turn Clockwise - Lock
Front Bumper Cover
Lower In Headlight Housing
Re-insert the bulb socket into the opening in the underside of the housing and twist it 1/4 turn in the clockwise direction to secure it into place.

If you installed an LED bulb, I recommend testing it before you re-attach the headlight housing.

If the LED bulb doesn't work, try removing it from the socket, rotating it 180 degrees and then pushing it back into place.

Some LED bulbs are polarized and will only work when the "+" positive and "-" negative electrical contacts are in the correct orientation.

To replace the headlight housing, turn it back over and line up the headlight with the opening in the engine bay.

Lower it down on to the front bumper cover.

Try to avoid scratching the painted surfaces or the plastic headlight lens cover.

Push on the headlight until it is fully seated.

Shorter Outer Bolt
Spin In Clockwise
Replace Plastic Fastener
Spin in the shorter bolt into the outer rear edge of the headlight housing.

Rotate it a few turns by hand in the clockwise direction to prevent it from becoming cross threaded.

Tighten the bolt in the clockwise direction with the 10mm socket and a ratchet until it is snug.

Avoid over tightening the bolt to prevent from cracking the plastic.

Make sure the black plastic screw is in the up and fully released position.

Push the plastic fastener into the small opening at the outer edge of the housing.

Either use the Phillips head screwdriver to tighten the plastic screw or just gently pop it down with your finger.

Tighten Bolt Clockwise
Longer Inner Bolt
Tighten Bolt Clockwise
Replace the slightly longer bolt at the inner edge of the housing.

Tighten it in the clockwise direction with the 10mm socket and ratchet until it is snug.

Headlight Assembly Secured
Test New Turn Signal
Turn Signal Bulb Replaced
Double check that the headlight assembly is properly installed and securely in place.

To test the new turn signal light bulb, activate the hazard signals.

Be sure to write down the bulb change in your vehicle's service records.

Please check out all of my 2015-2019 Ford Edge DIY Repair & Maintenance Guides.

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
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