OEM LED Headlight Control Module ULB - Freightliner Cascadia 2018+ 28 Pin - ZKW 1040.001.0940 66-01405-050

When a New Cascadia headlight goes dark, drops a beam mode or sets a headlamp control fault while the lamp assembly itself tests good, this is the part to suspect. The Universal Light Bar (ULB) control unit is the genuine Freightliner OEM module that manages the LED headlight functions on the New Cascadia, and a failed one leaves you with flicker, a dead lamp, or a beam that will not switch — a safety problem at night and an inspection defect in daylight. We stock these right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.

The Module Behind the Headlight: The Cascadia ULB Control Unit Advantage

This control unit regulates the current and switching supplied to the headlamp, and it is what actually turns driver input into low beam, high beam and daytime running lamp operation. Because the LED headlamp on this truck depends on the module rather than a simple switched circuit, a module fault reads exactly like a bad headlight — which is why so many good lamp assemblies get replaced before someone finally tests the control unit.

This is the updated unit, and it supersedes the earlier 66-01405-040. It uses the 28 pin connector and installs as the headlight control unit within the LED headlamp circuit. As a genuine OEM module it is also the direct equivalent of ZKW 1040.001.0940 and Continental A2C93182000-01. If you are chasing intermittent Cascadia headlight faults, replacing the control unit is the repair that ends the cycle rather than resetting it.

Vehicle Fitment & Compatibility

This genuine OEM control module is intended for the following commercial application:

• Make/Model: Freightliner Cascadia (P4), 2018-2025
• Position: Headlight control unit within the LED headlamp circuit
• Function: Low beam, high beam and daytime running lamp control
• Connection: 28 pin connector
• Component Group: Exterior Lighting / Headlights & Fog Lights

Direct Replacement & Cross-Reference Numbers:

This genuine Freightliner control unit serves as a direct replacement for the following part numbers:

• Freightliner Interchange: 66-01405-040
• ZKW Interchange: 1040.001.0940
• Continental Interchange: A2C93182000-01
• Freightliner OEM #: 66-01405-050

Technical Specifications

• Component Type: LED Headlight Control Module (ULB Control Unit)
• Function: Controls low beam, high beam and daytime running lamp operation
• Connector: 28 pin
• Supersession: Updated unit, replaces 66-01405-040
• Condition: New
• Warranty: 1-Year FleetPro Warranty
• Brand: Freightliner (Distributed by FleetPro Parts & Tires)