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Ultra-Extended 38-Foot 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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Left-Hand (LH) Optimization: Color-coded and engineered specifically for hassle-free installation on the vehicle's driver side (utilizing the standard yellow turn circuit).
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Space-Saving Flat Cable Profile: Slim design routes cleanly through tight spaces along the frame rail without catching, rubbing, or snagging.
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Premium 14 AWG Conductors: Thicker 14-gauge 3-wire construction handles electrical loads effortlessly and improves overall tensile strength across long distances.
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Factory-Sealed Straight PL-3 Plug: Delivers a secure, moisture-proof interface that guards critical pin terminals from road grime, water spray, and de-icing chemicals.
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5-Year Manufacturer Warranty: Backed by Truck-Lite’s trusted 5-Year Limited Warranty, providing peace of mind and long service life.
Truck-Lite 50345 – 50 Series 456” 1-Plug Flat Left-Hand (LH) Side Turn Signal Wiring Harness | Straight PL-3 to Blunt Cut, 14 Gauge
The Truck-Lite 50345 (50 Series) Left-Hand (LH) Side Turn Signal Wiring Harness is an ultra-long, commercial-grade electrical assembly designed specifically to route turn signal and side marker power down the extended driver side of trucks, trailers, and long-haul fleets. Spanning an impressive 456 inches (38 feet) in length, this premium 1-plug harness delivers continuous, clean power from your central control source all the way to your left-hand side lighting configuration, ensuring proper signaling, increased roadway safety, and complete federal highway compliance across maximum distances.
Low-Profile Flat Design Built for Extended Left-Side Routing
Extended left-side wiring paths are subjected to intense environmental exposure, wind resistance, and tight frame-rail clearances over long spans. The Truck-Lite 50345 features a low-profile flat cable configuration that easily slides along the vehicle frame rail to save space and minimize friction. Built with heavy-duty 14-gauge copper conductors, this 3-conductor harness protects against voltage drops and resists internal electrical strain over its 38-foot run. One side is outfitted with a factory-molded Straight PL-3 plug to establish a weatherproof, corrosion-free seal directly at the lamp connection. The opposing end is Blunt Cut, allowing technicians maximum flexibility to cleanly strip, custom-splice, or hardwire the brown, yellow, and white lead lines directly into a main junction block or central distribution system without requiring unsafe intermediate field splices.