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Every listing shows the truck make, model years, side (left/right) and OEM cross-reference numbers. Match any of your OEM numbers to the listing, or send us your number and we will confirm fitment.

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30-day returns on unused parts in original packaging. Wrong part shipped by us? We cover the return label and ship the correct one first.

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Are these OEM or aftermarket parts?

We sell quality aftermarket parts cross-referenced to OEM numbers, plus select OEM-grade lines. Brand and grade are shown on every listing.

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OEM Headlight Wiring Harness LED, Freightliner

Genuine Freightliner wiring harness for LED headlights. OEM A66-00114-000. Correct connectors out of the box, no splicing into the factory loom.

Brand
- Freightliner
Truck Make
- Freightliner
Fitment
- Freightliner Cascadia (P4) 2018-2025
Condition
- New
Warranty
- 1-Year FleetPro Warranty

Wholesale pricing for approved accounts

Open a FleetPro business account to see fleet pricing and order online. Repair shops, trucking companies & dealers welcome.

Request a business account

Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days

Internal Reference: A66-00114-000

Same-day shipping before 12PM CT from our Illinois warehouse
Part requests and quotes answered within one business hour
30-day returns
1-Year FleetPro Warranty
Wholesale and fleet pricing for approved business accounts
We speak English, Russian, Ukrainian, Romanian, Bulgarian, French and Polish

Headlight Wiring Harness, Specifications & Fitment

This is the OEM headlight wiring harness for the Cascadia LED headlight system, supplying power and signal to the headlamp, marker and outline lights from the chassis side of the circuit. Over time these harnesses suffer chafed insulation, corroded pins, and cracked connectors that cause flickering lamps, intermittent function, or a dead headlight, and a damaged harness is often the real cause of a headlight fault when the lamp and control module both test good. Replacing the harness restores a clean connection rather than patching individual wires.

Specifications

Type: Headlight wiring harness
Application: LED headlamp, outline and marker lights, chassis side
Function: Carries power and signal to the headlight assembly

Where it's used

Fits Freightliner Cascadia. Connects the LED headlamp and outline lighting to the chassis wiring.

Cross references: Freightliner A66-00114-000

Product Details

Brand	Freightliner
Truck Make	Freightliner
Fitment	Freightliner Cascadia (P4) 2018-2025
Condition	New
Warranty	1-Year FleetPro Warranty

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