The 2018-2021 Ford Expedition came with either factory halogen or factory LED tail lights, depending on trim and package. Many owners with halogen tail lights want the OEM LED tail lights instead.
TAILLIGHTS NOT INCLUDED. The KVS kit is a pair of conversion harnesses only.
Quick Answer
Yes, you can install OEM LED tail lights on a 2018-2021 Expedition that came with halogen tail lights. The LED lights bolt on, but the factory halogen wiring does not match them. You need a vehicle-specific conversion harness.
What you need:
- A pair of 2018-2021 Ford Expedition OEM LED tail lights (sold separately)
- The 2018-2021 Ford Expedition Halogen to LED Tail Light Conversion Harness (one left and one right harness, standard load resistors included)
- A metal surface to mount the load resistors
Why OEM LED Tail Lights Are Not Plug and Play
The LED tail lights physically bolt onto the truck. The electrical side is different.
Factory halogen and factory LED tail lights use different wiring layouts. The LED tail lights are not designed to run on the original halogen wiring. A conversion harness bridges that difference and leaves the factory wiring in place.
Not sure what your truck has? See Can I Upgrade My Factory Halogen Taillights to OEM LED Taillights?
What the Conversion Harness Does
The harness plugs in between the factory halogen connectors and the OEM LED tail light assemblies. It adapts the wiring so the LED tail lights can work correctly.
- Plugs into the factory connectors
- Adapts the halogen wiring to the LED tail light configuration
- Keeps the factory wiring intact
- No cutting or splicing
Load Resistors
The standard harness includes load resistors. They are part of the conversion and must be installed.
An optional premium configuration is available. It replaces the standard resistors with two premium aluminum load resistors. The standard harness already includes everything needed for proper operation.
Resistor Mounting Note
The load resistors get hot during operation.
- Mount them to a metal surface
- 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 materials
Installation Overview
- Remove the factory halogen tail light assemblies.
- Connect the conversion harnesses to the factory vehicle connectors.
- Connect the OEM LED tail lights to the harnesses.
- Mount the load resistors to a metal surface with a screw or bolt.
- Secure the wiring and reinstall the tail lights.
- Test all lighting functions.
No cutting or splicing is required.
Fitment
This harness fits:
- 2018 Ford Expedition
- 2019 Ford Expedition
- 2020 Ford Expedition
- 2021 Ford Expedition
The truck must have factory halogen tail lights. It converts to 2018-2021 Ford Expedition OEM LED tail lights.
It does not fit:
- Trucks that came with factory LED tail lights
- Aftermarket tail lights with non-OEM connector pinouts
Going the other way? If your Expedition has factory LED tail lights and you need to install halogen tail lights, use the LED to Halogen Tail Light Conversion Harness. See the 2018-2021 Expedition LED to Halogen Tail Light Guide.
Before You Order
- Your truck is a 2018-2021 Ford Expedition
- It came with factory halogen tail lights
- You are installing 2018-2021 OEM LED tail lights
- Your replacement tail lights use OEM connector pinouts
- You have a metal mounting spot for the load resistors
Questions about fitment? Contact us before you order.
Frequently Asked Questions
Do I need to cut or splice any wires?
No. The harness plugs into the factory connectors.
Why are load resistors included?
They are part of the conversion. They help the OEM LED tail lights work correctly on the halogen wiring.
Do I have to mount the resistors?
Yes. Mount them securely to a metal surface so they can shed heat.
What is the optional premium resistor configuration?
It swaps the standard load resistors for two premium aluminum load resistors. The standard harness already works without it.
Will this work on a truck that already has factory LED tail lights?
No. It is only for trucks that came with factory halogen tail lights.
Are the tail lights included?
No. TAILLIGHTS NOT INCLUDED. The kit is one left and one right conversion harness. OEM LED tail lights are sold separately.
