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Freightliner OEM Compatibility: Popular direct-fit upgrade and replacement component on Freightliner commercial vehicles where the lamp mounts flush on a flat surface.
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High-Output 16-Diode Performance: Outfitted with an array of 16 intense yellow/amber diodes that deliver crystal-clear warning power for both continuous marker and secondary turning functions.
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Epoxy-Sealed Moisture Protection: Electronics are fully encapsulated and completely sealed in a high-grade protective epoxy, rendering the assembly impervious to moisture, road spray, and chemical corrosion.
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Extended 59" Wiring Harness: Built with a 3-wire, 16-gauge hardwired setup transitioning to a premium AMP 282105-1 connector terminal, backed by an expansive 59-inch mating harness to simplify long-run installation.
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Vibration and Shock Immune: Filament-free, solid-state construction guarantees the circuit board is fully resistant to the destructive chassis vibrations, bumps, and rough conditions of long-haul trucking.
Truck-Lite 21090Y – 21 Series Yellow Rectangular 16-Diode LED Marker Clearance & Auxiliary Turn Light, 59" Mating Harness, AMP 282105-1, 12V
Upgrade your commercial rig's exterior safety and signaling with the high-performance Truck-Lite 21090Y 21 Series Yellow Rectangular LED Marker Clearance and Auxiliary Turn Light Assembly. This premium 2x6-inch sealed multi-function lamp comes complete with a generous 59-inch mating harness and features a heavy-duty, high-visibility 16-diode configuration. Widely recognized as a highly popular replacement on Freightliner trucks (specifically where the lamp is not mounted on a curved surface), it serves dual duties as both a standard clearance/marker lamp and a fast-acting turn signal. Upgrading from older, slower incandescent lights to this advanced LED setup guarantees superior brightness and an instantaneous start-time, providing immediate visibility to surrounding drivers.
Alternative Part Variations: TK21090Y
NAPA: 21090Y / LIT21090Y
Freightliner / OEM Interchanges: 21090Y-TLT, TL21090Y, TRU21090Y
Related Models (Varying Harness Lengths): Truck-Lite 21091Y (39" Harness), 21094Y (12" Harness)