Resources & Knowledge Base
Technical articles, guides, and documentation for heavy-duty truck and trailer parts
Coiled Trailer Cable Lengths: 12 ft vs 15 ft
A published coiled-cable length is a working — extended — length, not the relaxed length or the gap it bridges at rest. How to choose between 12 ft and 15 ft, and how to confirm what you are getting.
SPNA Is Now a Member of MEMA Aftermarket Suppliers
Sertplas North America (SPNA) has joined MEMA Aftermarket Suppliers, the membership group of MEMA, The Vehicle Suppliers Association. For the fleets, distributors and repair shops we serve, it means the company supplying your tractor-trailer air and electrical connection parts is now part of the same industry body that shapes heavy-duty aftermarket standards, research and events in North America.
3-in-1 Trailer Air and Electric Assemblies Explained
A 3-in-1 airpower assembly bundles the service air line, the emergency air line and the 7-way trailer cable into one unit. What that changes about coupling, wear and replacement.
Roughly 700,000 Miles on One Trailer Cable: A Field Durability Case Study for U.S. Fleets
A 2018 Mercedes-Benz Actros ran ~700,000 miles on its original Sertplas trailer cable and air lines. What it means for U.S. fleet uptime, TCO, and SAE-spec parts.
SAE J560 7-Way Trailer Connector Pin-Out Reference
Which contact and colour carries which circuit in an SAE J560 7-way trailer connector, why white and blue are the heavy conductors, and how to trace a dead trailer circuit back to a terminal.
IATF 16949 and VDA 6.3: What They Mean for Fleet Buyers
IATF 16949 certifies an automotive quality management system; VDA 6.3 audits the manufacturing process itself. What each one actually tells a parts buyer, and what to ask for.
ISO 7638 ABS and EBS Power Cables Explained
ISO 7638 is the dedicated trailer ABS and EBS power connector, with a 24 V and a 12 V variant. What each contact does, and why North American trailers use the J560 blue conductor instead.
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