CheeMuii 7-Way Trailer Cord and Air Brake Hose Assembly — 15FT Coiled, DOT-Approved Pure Copper

This assembly pairs a premium 7-way electrical cord made from high-conductivity pure copper with dual coiled nylon air brake hoses and DOT brass fittings. Built to OEM specifications, the kit replaces several factory part numbers and is engineered for durability, corrosion resistance, and consistent signal and air delivery between tractor and trailer while on the road.

How does this assembly keep my trailer lights and signals working?

The electrical cord uses pure copper conductors and robust insulation to ensure steady current flow to brake lights, turn signals, and marker lights. Good thermal and electrical conductivity reduces voltage drop and helps lights remain bright under load.

• 7-way 7-pin configuration for full lighting and auxiliary circuits
• Pure copper wiring for improved conductivity and longevity
• Durable jacket resists abrasion and weather exposure
• Designed to meet SAE J2394 wiring standards

Are the air hoses safe and compliant with industry standards?

The coiled air brake hoses are manufactured from PA12 nylon using a three-layer molding process to deliver consistent wall thickness and high burst pressure ratings. Fittings are CA360 brass and meet D.O.T. FMVSS 571.106 and SAE J1131 requirements for air brake systems.

• PA12 nylon construction for flexibility and high-pressure resistance
• DOT-approved CA360 brass 1/2" fittings with corrosion resistance
• Three-layer molding ensures uniform strength and durability
• Designed to comply with SAE J844 and FMVSS specifications

What features protect the cord and hoses from wear during use?

Both ends of the air hoses are reinforced with stainless steel spring guards that prevent kinking and shield the connection points from abrasion. The electrical cable jacket and coiled design also minimize strain and reduce risk of damage while the rig moves.

• Stainless steel spring guards at hose ends to prevent kinks
• Coiled air line reduces slack and limits dragging hazards
• Thick electrical jacket for abrasion and weather resistance
• Flexible components make installation and detachment easier

Can this assembly replace OEM parts from other brands?

This CheeMuii assembly is manufactured to match common OEM specifications and is listed as a compatible replacement for many industry part numbers. It can be a cost-effective substitute for several branded cords and air lines while meeting the same functional standards.

• Air hose compatible with Tectran 17215 and others
• Electrical cord fits replacements like Philips 30-4621 and Velvac 590161
• Meets SAE and DOT manufacturing and safety standards
• Offered at a lower price than many dealer-supplied assemblies

Who is this for: This rugged 15-foot coiled assembly is suited for truck operators, fleet managers, and trailer owners who need a dependable, OEM-grade replacement for 7-way electrical and air brake connections. It’s a practical choice for anyone wanting DOT-compliant fittings, tougher-than-average air lines, and a compact coiled layout to reduce drag and wear during towing.