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USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
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For Your Every Summer RSVP, with Code: SUMMER15
Description
7-Way Trailer Wiring Harness with Junction Box – 8FT, Weatherproof, RV-Standard, Heavy Duty TC78WSimplify and secure your trailer's electrical system with this Heavy Duty 7 Way Trailer Wiring Harness featuring an 8FT cord and weatherproof junction box. Built for durability and compatibility with RV standard configurations, this setup is ideal for RVs, trailers, food trucks, and other tow behind vehicles. Key Features All in One Wiring Harness Pre molded 7 way copper blade plug combined with a rugged junction box provides fast, secure, and
Simplify and secure your trailer's electrical system with this Heavy-Duty 7-Way Trailer Wiring Harness featuring an 8FT cord and weatherproof junction box. Built for durability and compatibility with RV-standard configurations, this setup is ideal for RVs, trailers, food trucks, and other tow-behind vehicles.
🔧 Key Features
-
All-in-One Wiring Harness
Pre-molded 7-way copper blade plug combined with a rugged junction box provides fast, secure, and organized wiring for turn signals, brake lights, tail lights, and auxiliary power. -
Color-Coded 7-Gang Junction Box
Solid ABS housing with clearly marked terminals simplifies installation and reduces guesswork for all standard 7-way RV applications. -
Heavy-Duty & Weatherproof Design
8-foot cord made of 100% pure copper wire housed in a durable, flameproof PVC jacket. Waterproof grommets seal the box and protect wiring from dust, corrosion, and the elements. -
Flexible Installation Options
Comes with 4 open and 4 closed grommets to adapt to your specific cable layout. Built to last for rugged use on the road or worksite.
⚙️ Specifications
- Plug Type: 7-Way RV Standard (Please verify plug layout)
- Cord Length: 8 Feet
- Wiring Material: Pure Copper
- Junction Box: Flameproof ABS with weatherproof grommets
- Use Cases: RVs, utility trailers, food vans, horse trailers, boat trailers, and campers
- Voltage: 12V Systems
🧰 Compatible With:
- Travel trailers
- Fifth wheel campers
- Horse and boat trailers
- Food trucks
- Utility haulers and car haulers
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Good quality though
Size: 2AWG 15FT + 15FT, Color: Red + Black
Good though quality
Thick
Works good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 15, 2025
★★★★★ 5
Heavy-Duty 4 AWG Cable With Flexible Insulation
Size: 10ft, Color: 4awg
I am satisfied with this 4 AWG cable. The insulation coating is soft, and the cable itself is very pliable, making it easy to bend and route into the configuration needed for installation. Despite the flexibility, it still feels like a heavy-duty cable designed to handle demanding applications.
I am using this cable to provide the necessary amperage to start the generator on my trailer, and it performs as expected. I also like that the wire gauge and cable properties are clearly printed along the side of the insulation, making identification easy during installation or future maintenance.
The cable arrived in good condition with no obvious odor from the insulation or packaging. Overall, this appears to be a quality heavy-duty cable that is flexible, easy to work with, and suitable for high-current applications.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
True copper battery cables that are high quality
Size: 10ft, Color: 4awg
I love having heavy duty cable on hand for my cars. It's so nice to be able to make your own starter and alternator cables when restoring cars.
These cables are 100% copper, not CCA (copper clad aluminum) like many others are. Copper is far superior for conductivity and handling higher loads.
The rubber on the cable is thick and yet very flexible..it's clearly marked and seems very durable. I like to use a hydraulic crimping tool and then add marine grade heat shrink tubing with the adhesive inside of it to keep it as weatherproof as possible.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Easy to work with
I bought this to wire up an airplane I built. I had to cut it into 10 separate pieces and crimp and solder lugs to each end. It was just the right length for what I needed and I'm very happy with the results.
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Reviewed in the United States on January 5, 2024
★★★★★ 5
Good product. I will buy again.
Great value. It did show up covered in small fiberglass particles which was a bit annoying.
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Reviewed in the United States on March 10, 2021
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