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Application: Exact OEM replacement 7-way round-pin female connector plug for tractor-to-trailer cords
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Primary Function: Reliable transmission of electrical signals for Stop/Turn/Tail and auxiliary lighting circuits
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Number of Conductors: 7-Wire / 7-Pole configuration
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Plug Side One: Female 7-Pole Plug
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Plug Side Two: Internal Packard style junction
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Wire / Harness Compatibility: Optimized for 18 AWG / GPT (General Purpose Thermoplastic) wiring setups
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Structural Material: Zinc Die-Cast Housing with a High-Density Nylon Insert
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Terminal Material: High-Conductivity Solid Brass
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Environmental Protections: Integrated rear moisture seal and chemical-resistant core
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Strain Relief System: 360-degree mechanical cable clamp
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Total Harness Component Length: 8.5 inches
Truck-Lite 97158 7-Way Nylon Trailer Connector Plug (7-Conductor, Female 7-Pole, Heavy-Duty Replacement Plug)
Restore uncompromised electrical connectivity and maximum signal reliability down your trailer line with the heavy-duty Truck-Lite 97158 7-Way Nylon Trailer Connector Plug. Specifically engineered as a premium, long-lasting replacement plug for main tractor-to-trailer auxiliary power networks, this 7-conductor female connector is an essential component for commercial fleet operations, vocational truck repair shops, and heavy freight transport logistics.
Built to overcome the structural failures common to standard, cheap trailer plugs, this connector is constructed using a high-impact, heavy-duty nylon insert combined with a rugged zinc die-cast external housing. To ensure flawless power delivery and minimal voltage drop across your stop, turn, tail, and auxiliary circuits, it features premium, highly conductive solid brass terminals. The inner nylon core is chemically engineered to remain highly stable when exposed to aggressive road variables, offering superior resistance against degreasers, solvents, contact cleaners, and harsh petro-chemicals.
Designed to handle severe over-the-road environments, the Truck-Lite 97158 features a unique 360-degree internal cable clamp that firmly anchors the wire harness. This active strain relief ensures that the cord cannot be accidentally yanked, twisted, or pulled out of its seats during sharp turns or intense frame vibrations. To lock out water ingress and eliminate green-wire corrosion, it is completed with a heavy-duty rear moisture seal that stops highway grime, road salt, and rain from penetrating the core electrical housing.

