The 2018–2020 Ford F-150 came with either factory halogen or factory LED headlights, depending on trim. Many owners of halogen trucks want to fit the OEM LED headlight assemblies for a more modern look.
Can you install OEM LED headlights on a 2018–2020 F-150 that came with halogen headlights?
Yes, but the headlights alone are not enough. The OEM LED assemblies bolt on, but the halogen and LED systems are wired differently. A headlight conversion harness adapts the factory halogen wiring so the LED headlights work without cutting or splicing.
Shop the harness here: 2018-2020 Ford F150 Halogen To LED Headlight Conversion Harness PNP. HEADLIGHTS NOT INCLUDED.
Quick Answer
- Fits 2018, 2019 and 2020 Ford F-150 trucks with factory halogen headlights.
- Converts to 2018–2020 F-150 OEM LED headlights.
- Plug and play. No cutting or splicing.
- Includes one left and one right harness, with load resistors.
- The resistors must be mounted to metal with a screw or bolt.
- Not for trucks that came with factory LED headlights.
Not sure which headlights your truck has? See How to Tell What Type of Headlights Your Vehicle Has.
Why Upgrade to OEM LED Headlights?
Owners usually make this swap for:
- The factory LED look from the trims that came with LED headlights
- LED lighting in place of halogen bulbs
- OEM fit and finish instead of an aftermarket housing
Why Aren't OEM LED Headlights Plug and Play?
The OEM LED headlights bolt onto the truck, but the electrical systems differ. Halogen and LED trucks use different wiring layouts. On the original halogen wiring alone, the OEM LED headlights do not work correctly.
For more on why this happens across many vehicles, see Do I Need a Headlight Conversion Harness?
What Does the Conversion Harness Do?
The harness plugs into the factory halogen connectors and adapts them to the LED headlight configuration. It is designed to:
- Adapt the factory halogen connectors
- Match the wiring the OEM LED headlights expect
- Keep the factory wiring intact
- Remove the need for cutting and splicing
Load Resistors
Each harness includes load resistors. They help the OEM LED headlights operate properly on the halogen truck's wiring. The standard harness already includes everything needed for proper operation.
Optional Premium Load Resistors
You can choose an optional premium configuration. It replaces the included standard load resistors with two premium aluminum load resistors. Both configurations work for this conversion.
Resistor Mounting
The resistors give off heat. Mount them correctly:
- Mount them to a metal surface on the vehicle
- Secure them with a screw or bolt
- Do not mount them to plastic
- Do not mount them to wiring
- Do not mount them near heat sensitive surfaces
Installation Overview
Basic hand tools are enough.
- Remove the factory halogen headlight assemblies.
- Connect the conversion harnesses to the factory truck connectors.
- Connect the OEM LED headlights to the harnesses.
- Mount the load resistors to a metal surface with a screw or bolt.
- Secure the wiring and reinstall the headlights.
- Test all lighting functions.
Factory Halogen Trucks Only
This harness is only for 2018–2020 Ford F-150 trucks originally equipped with factory halogen headlights.
It converts to 2018–2020 Ford F-150 OEM LED headlights.
It is not compatible with:
- Trucks originally equipped with factory LED headlights
- Aftermarket headlights with non OEM pinouts
Have a 2015–2017 F-150? That truck uses a different harness. See the 2015–2017 F-150 Halogen to OEM LED Headlight Guide.
Before You Purchase
- Your truck is a 2018–2020 Ford F-150.
- It originally came with factory halogen headlights.
- You are installing 2018–2020 OEM LED headlight assemblies.
- Your headlights use OEM connector pinouts.
- You have a metal mounting spot for the load resistors.
Frequently Asked Questions
Do I need to cut or splice any wires?
No. The harness plugs into the factory wiring.
Why are load resistors included?
They help the OEM LED headlights operate properly after the conversion.
Do I have to mount the resistors?
Yes. Mount them to a metal surface with a screw or bolt so they can shed heat.
What is the premium load resistor option?
An optional upgrade. It swaps the standard resistors for two premium aluminum load resistors. The standard harness already works on its own.
Will this work on trucks that came with factory LED headlights?
No. It is only for trucks that came with factory halogen headlights.
Will it work with aftermarket headlights?
Not with aftermarket headlights that use non OEM pinouts. It is made for 2018–2020 F-150 OEM LED headlights.
Are the headlights included?
No. The kit includes one left side and one right side harness. Headlight assemblies are sold separately. HEADLIGHTS NOT INCLUDED.
Summary
A halogen 2018–2020 F-150 can run OEM LED headlights, but not on the original wiring alone. The halogen and LED systems are wired differently. A vehicle-specific harness with load resistors adapts the connections and keeps the factory wiring intact.
Related KVS Pages
- 2018-2020 Ford F150 Halogen To LED Headlight Conversion Harness PNP
- 2015–2017 F-150 Halogen to OEM LED Headlight Guide
- How to Tell What Type of Headlights Your Vehicle Has
- All Ford F-150 parts
HEADLIGHTS NOT INCLUDED. Questions about fitment? Contact us before you order.
