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Ultra-Extended Reach: At 456 inches long, this standard stocked length harness easily covers maximum spans along long trailer frames or chassis layouts.
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Flat Cable Profile: Low-profile flat cable design allows for clean, space-saving wire routing along tight trailer frame channels.
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Premium 14 AWG Construction: Upgraded 14-gauge copper wiring provides high tensile strength and safely manages consistent electrical current over a 38-foot run.
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Factory-Sealed Straight PL-3 Interface: Features a molded straight PL-3 pigtail connection point to isolate copper contacts from moisture intrusion and pin rot.
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Adaptable Blunt Cut End: Unfinished wire ends allow for direct hardwiring, custom terminal pin application, or direct splice integration into existing systems.
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5-Year Manufacturer Warranty: Backed by Truck-Lite’s trusted 5-Year Limited Warranty, securing long-term service life for your fleet.
Truck-Lite 50338 – 50 Series 456” 1-Plug Flat Stop/Turn/Tail Wiring Harness | Straight PL-3 to Blunt Cut, 14 Gauge
The Truck-Lite 50338 (50 Series) Stop/Turn/Tail (S/T/T) Wiring Harness is an ultra-long, commercial-grade electrical assembly designed to simplify tail lamp signaling across extended-frame vehicles. Spanning an impressive 456 inches (38 feet) in length, this premium 1-plug harness provides continuous, clean power from your central control source all the way to your rear brake, turn signal, and running lights. Constructed with a low-profile flat cable configuration and robust 14-gauge conductors, this harness minimizes electrical resistance and eliminates voltage drops across exceptional distances.
Engineered for Adaptability & Long-Frame Longevity
Longer wiring runs face extreme environmental exposure, severe wind resistance, and frame-rail friction. The Truck-Lite 50338 addresses these challenges with high-quality, factory-molded components that completely seal out moisture, dirt, and corrosive road treatments. One side of the harness features a Straight PL-3 molded plug connector that forms a tight, weatherproof seal directly into standard 3-pin S/T/T vehicle lamps. The opposite termination side is Blunt Cut, giving fleet technicians absolute freedom to cleanly route, custom-splice, or hardwire the 3-conductor internal lines (Black, Red, and White) directly into a centralized junction box or main distribution trunk line without requiring unsafe intermediate field splices.