Truck-Lite 97366 Model 33 Dual-Function Marker Clearance Plug (11.5-Inch Pigtail, 16 Gauge GPT Wire, Straight PL-3 / Fit 'N Forget S.S. to Female .180 Bullet)

Optimize your commercial vehicle's safety profile and unlock seamless dual-stage visibility with the advanced engineering of the Truck-Lite 97366 Model 33 Marker Clearance Plug. Specifically built to integrate with Truck-Lite’s premium Fit 'N Forget Stop/Turn/Tail (S.T.T.) systems and 33 Series lamps, this heavy-duty 11.5-inch pigtail adapter functions as a high-performance replacement wiring component for long-haul freight trailers, vocational fleet bodies, and commercial truck builders.

This specialized dual-function adapter plug delivers intelligent vehicle utility right out of the box: it enables compatible marker and clearance lamps to operate across two distinct light output levels. Under normal driving conditions, your connected lamps emit a standard marker glow; the moment the service brakes are applied, the smart pigtail circuit actively shifts the marker loop to an enhanced, attention-grabbing auxiliary braking safety warning. This dual-level function significantly boosts rear-end and high-profile presence awareness, keeping your asset protected against mid-route rear-end collision risks. For optimal performance, it is engineered for vehicles maintaining a stable 11.9V to 13.5V electrical architecture.

Built to survive years of brutal over-the-road operational demands, the 97366 completely eliminates the hand-splicing mistakes and loose terminal contacts common to standard shop wiring fixes. On the primary side, it features a specialized Straight PL-3 / Fit 'N Forget S.S. connection style that mechanically locks and forms a water-tight seal onto your main lamp socket. The secondary end seamlessly transitions into a corrosion-resistant female .180 bullet terminal. Constructed from robust 16-gauge GPT (General Purpose Thermoplastic) copper conductors and engineered with an 8-wire structural matrix, this pigtail acts as an aggressive barrier against water ingress, highway de-icers, and corrosive road salts to completely eliminate green-wire terminal rot.