Description
Product Overview
The Truck-Lite 40 Series 4-inch round back-up light is engineered for heavy‑duty commercial vehicles. Constructed from a polished silver, dustproof housing, it protects the incandescent bulb from vibration, shock, and road grime. The clear lens maximizes light projection, offering a wide field of view for precise reversing. Designed for 12V systems, it features a standard PL-2 socket for fast, tool‑free installation and complies with industry safety standards. Model TK40204-P (40204-P) fits a broad range of trucks, trailers, and utility vehicles.
Usage
This back‑up lamp excels in demanding environments such as loading docks, construction yards, and tight warehouse aisles where accurate maneuvering is critical. Fleet operators, owner‑operators, and service technicians rely on its bright illumination to prevent collisions when backing up trailers, dump trucks, or service vans. Its dustproof design ensures consistent performance in dusty or wet conditions, making it suitable for both urban deliveries and off‑road applications.

Why Choose Us
Truck‑Lite is a trusted name in professional lighting, offering products that meet rigorous OEM specifications. This back‑up light provides a rugged construction that outlasts generic replacements, backed by a 24‑month warranty for peace of mind. Our distribution network guarantees genuine parts, and our technical support assists with fitment questions, ensuring minimal downtime for your fleet.
Key Features
- Durable polished silver housing resists dust, vibration, and impact.
- Clear lens delivers wide‑angle, bright illumination for safe reversing.
- Standard PL‑2 socket enables quick, tool‑free installation.
- Designed for 12V systems and compatible with a wide range of trucks and trailers.
- Backed by a 24‑month warranty and supported by Truck‑Lite’s industry expertise.
FAQ
What type of bulb does this back‑up light use?
The unit comes with a built‑in incandescent bulb optimized for bright, clear output. Replacement bulbs must match the original specifications for voltage and wattage.
Is the back‑up light compatible with all truck models?
It is designed for vehicle‑specific fit on most medium to heavy‑duty trucks and trailers. Verify the part number TK40204‑P against your vehicle’s OEM specifications.
Can I install this lamp myself?
Yes. The PL‑2 socket allows a plug‑and‑play connection to standard wiring harnesses, eliminating the need for soldering or specialized tools.
Does the dustproof feature affect light output?
No. The dustproof housing is engineered to protect internal components while maintaining optimal light transmission through the clear lens.
What warranty does Truck‑Lite provide?
This back‑up light includes a 24‑month limited warranty covering defects in materials and workmanship.




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