Truck-Lite 50805 7-Way Trailer Nose Box – 50 Series, 7 Solid Pin

Replace a damaged or corroded trailer electrical receptacle with the genuine Truck-Lite 50805 7-Way Trailer Nose Box, designed for commercial truck and trailer electrical systems.

This 50 Series surface-mount nose box features seven solid electrical pins, a rugged gray polycarbonate housing, and sealed internal electrical contacts to help protect the connection from moisture and corrosion.

Mounted on the front of a compatible trailer, the nose box receives the electrical plug from the tractor's 7-way pigtail cord, providing the primary electrical connection between the tractor and trailer.

Truck-Lite's 50805 nose box is designed for demanding commercial applications and features color-coded trailer wiring terminals, factory-tested electrical performance, and a durable housing resistant to chemicals and environmental exposure.

The manufacturer rates the assembly for 40-amp electrical capacity and identifies the 50805 as the version without circuit breakers.

Whether you're replacing a damaged trailer receptacle, repairing electrical connection problems, or installing a new trailer wiring system, the Truck-Lite 50805 provides a durable, genuine replacement option.

Truck-Lite Part Number: 50805

Roll Off Truck & Trailer Parts SKU: LT053

Connection Type: 7 Solid Pin

Mounting Style: Surface Mount

Circuit Breakers: Not Included

Features & Benefits

• Genuine Truck-Lite 50805: Original Truck-Lite 50 Series trailer nose box.

• 7 Solid Pin Receptacle: Provides a mating electrical connection for compatible commercial trailer 7-way plugs.

• 40-Amp Electrical Capacity: Factory-tested electrical rating published by Truck-Lite.

• Gray Polycarbonate Housing: Durable enclosure designed to withstand demanding commercial trailer environments.

• Sealed Internal Electrical Contacts: Helps protect electrical connections against moisture-related corrosion.

• Color-Coded Wiring Terminals: Helps identify trailer main cable connections during installation and servicing.

• Surface-Mount Design: Suitable for compatible trailer installations and replacement applications.

• Chemical-Resistant Construction: Durable housing for exposure to road grime and common commercial operating conditions.

• Without Circuit Breakers: Correct replacement for applications requiring the non-breaker 50805 configuration.

• One-Year Manufacturer Warranty: Subject to Truck-Lite's applicable warranty terms.

Product Specifications

What Is a 7-Way Trailer Nose Box?

Commercial trailers rely on an electrical connection between the tractor and trailer to operate the required lighting and electrical circuits.

The Truck-Lite 50805 nose box is mounted to the trailer and serves as the receiving receptacle for the tractor's electrical pigtail.

When properly connected and wired, the 7-way system provides electrical pathways for functions such as:

• Tail and running lights

• Stop lights

• Left and right turn signals

• Trailer auxiliary electrical circuits

• Electrical power and ground connections

• Other supported circuits according to the trailer wiring configuration

The exact circuit assignments depend on the wiring standard and vehicle installation.

Important: This product is the trailer-mounted receptacle/nose box. The detachable tractor-to-trailer electrical cable is not included.

Rugged Gray Polycarbonate Construction

Truck-Lite manufactures the 50805 using a durable gray polycarbonate housing.

Polycarbonate construction provides resistance to impact and chemical exposure in commercial trailer environments.

The housing helps protect the internal electrical connections from conditions commonly encountered during daily operation, including:

• Road spray

• Mud and debris

• Road salt

• Vibration

• Environmental moisture

• Common commercial vehicle contaminants

The manufacturer's sealed-contact design further helps reduce moisture exposure at the internal electrical connections.

Sealed Electrical Contacts and Color-Coded Wiring

Reliable trailer electrical connections are essential for proper lighting and equipment operation.

The Truck-Lite 50805 includes sealed internal electrical contacts that help protect the connection against corrosion.

The nose box also features color-coded trailer main cable terminals, helping installers identify wiring connection locations.

These features are especially useful during:

• Trailer nose box replacement

• Trailer electrical system repairs

• Wiring harness replacement

• New commercial trailer installations

• Electrical troubleshooting and maintenance

Always follow the applicable Truck-Lite wiring instructions and trailer electrical standards when connecting the receptacle.

40-Amp Factory-Tested Electrical Design

Truck-Lite identifies the 50805 nose box as electrically factory-tested with a 40-amp capacity.

This published specification describes the manufacturer's stated electrical capacity for the nose box.

It does not replace the need for correctly sized wiring, approved connectors, and appropriate circuit protection.

Important: The 50805 does not include built-in circuit breakers. Electrical circuit protection must be provided as required by the trailer's electrical design.

Truck-Lite 50805 vs. 50806: What's the Difference?

Truck-Lite offers closely related 50 Series nose boxes with different circuit protection configurations.

Choose Truck-Lite 50805 when your application requires a nose box without integrated circuit breakers.

If your existing nose box has built-in circuit breakers, confirm whether Truck-Lite 50806 is required before ordering.

Common Applications

The Truck-Lite 50805 is designed for compatible 7-way electrical connection installations on commercial trailers, including:

• Roll-off trailers

• Dump trailers

• Semi-trailers

• Flatbed trailers

• Equipment trailers

• Waste and recycling trailers

• Construction and demolition hauling trailers

• Other heavy-duty commercial trailer applications

The nose box may be used for replacement or new installations when the electrical connection type, mounting arrangement, and wiring requirements match.

Compatibility is determined by the existing electrical system, not simply the trailer manufacturer or trailer type.

Signs Your Trailer Nose Box Needs Replacement

Commercial trailer electrical receptacles are exposed to repeated connections, road vibration, moisture, and harsh operating conditions.

Common reasons to inspect or replace a nose box include:

• Broken or damaged receptacle housing

• Worn or damaged electrical pins

• Corroded electrical contacts

• Loose or intermittent 7-way electrical connections

• Missing or damaged protective cover

• Damaged internal wiring connections

• Trailer lighting problems traced to the receptacle

Electrical issues can also originate in the tractor's pigtail, trailer wiring harness, grounds, lamps, or related components.

Inspect the complete electrical system before replacing the receptacle.

How to Verify the Correct Truck-Lite Nose Box

Before ordering, compare your existing trailer receptacle with Truck-Lite 50805.

1. Verify the Part Number

Confirm that your existing nose box is Truck-Lite 50805 or a verified equivalent.

2. Check the Pin Configuration

This product has seven solid pins. Compare the connector with your existing trailer receptacle.

3. Confirm the Housing Style

This is a gray, surface-mount 50 Series nose box.

4. Check Circuit Breaker Requirements

Truck-Lite 50805 does not include circuit breakers. If your system requires integrated 15-amp breakers, verify whether 50806 is the appropriate part.

5. Compare the Mounting Arrangement

Measure the available mounting space and verify the correct hole pattern and mounting clearance.

6. Check the Trailer Wiring

Confirm the correct cable connections, terminal arrangement, grounding, and required circuit protection.

Important: Do not assume that every 7-way receptacle or trailer nose box uses the same mounting pattern or electrical configuration.

Frequently Asked Questions

What is Truck-Lite part number 50805?

Truck-Lite 50805 is a 50 Series commercial trailer nose box featuring seven solid electrical pins, a gray polycarbonate housing, and surface mounting.

Is this a complete 7-way trailer receptacle?

Yes. It is a trailer-mounted nose box/receptacle assembly, not merely a replacement cap or a detachable cable-end plug.

Does it include circuit breakers?

No. Truck-Lite 50805 is the version without circuit breakers.

What is the difference between Truck-Lite 50805 and 50806?

Both are 50 Series, seven-solid-pin nose boxes. The 50805 does not include circuit breakers, while the 50806 is specified with 15-amp circuit breakers.

What material is the housing?

Truck-Lite specifies gray polycarbonate.

What is its electrical capacity?

Truck-Lite publishes a factory-tested 40-amp electrical capacity for this nose box.

What are the overall dimensions?

The manufacturer lists approximately 6.19" deep × 5.76" high × 3.06" wide.

Does the nose box include the tractor-to-trailer pigtail cable?

No. The tractor's electrical pigtail cord is a separate component.

Can this be used on a roll-off trailer?

Yes, if the trailer uses a compatible 7-way electrical system and the correct mounting and wiring configuration.

Does it have a warranty?

Yes. Truck-Lite lists a one-year warranty, subject to applicable terms.

What is the store SKU?

The Roll Off Truck & Trailer Parts SKU is LT053.

Order Your Truck-Lite 50805 Trailer Nose Box

Maintain a dependable electrical connection between your tractor and trailer with the genuine Truck-Lite 50805 7-Way Surface Mount Nose Box.

Featuring seven solid pins, a durable gray polycarbonate housing, sealed internal contacts, color-coded wiring terminals, and a manufacturer-listed 40-amp electrical capacity, this 50 Series nose box is designed for demanding commercial trailer applications.

Truck-Lite Part Number: 50805

Store SKU: LT053

7 SOLID PINS — SURFACE MOUNT — WITHOUT CIRCUIT BREAKERS

Order your Truck-Lite 50805 trailer nose box online today!

Fitment Note: Confirm the original nose box part number, pin style, mounting pattern, wiring configuration, and circuit-breaker requirements before purchasing.

SKU: