Carter's 14Pin to 16Pin Adapter — simple, reliable connection between older truck OBD2 ports and modern CAT diagnostic tools. This adapter converts a Carter's 14pin old truck transfer line OBD2 connector to a standard 16pin interface so you can use CAT 14PIN ET diagnostic extension plugs and OBD2compatible scanners without modifying the vehicle wiring. It solves the common problem of incompatibility between legacy truck diagnostic ports and newer diagnostic equipment, making troubleshooting and maintenance faster and more efficient. Key benefits Enables compatibility: Connect CAT ET diagnostic extension plugs and many 16pin OBD2 scanners to trucks with Carter's 14pin transfer line ports. Saves time and cost: No rewiring or permanent changes required; plugandplay connection for diagnostics and data access. Reduces downtime: Quickly attach diagnostic tools for fault reading, programming, and maintenance checks on older vehicles. Highlights and attributes Functionality: Converts a 14pin vehicle connector to a 16pin diagnostic interface. Compatibility: Designed specifically for Carter's 14pin old truck transfer line OBD2 connector and CAT 14PIN ET diagnostic extension plug. Form factor: 14pin to 16pin adapter configuration for direct, inline connection. Performance: Intended as an extension/adapter for diagnostic use, facilitating reliable signal routing between vehicle port and diagnostic tool. Typical applications / use cases Fleet maintenance: Technicians can use a single CAT ET diagnostic tool across mixed fleets that include older trucks equipped with Carter's 14pin transfer line ports. Workshop diagnostics: Quickly connect bench or mobile diagnostic scanners to an older truck's OBD2 connector during troubleshooting, fault code reading, and system checks. Roadside servicing: Field technicians can carry the adapter to enable immediate access to CAT diagnostic tools without carrying multiple harnesses or performing field wiring work. What you get A plugandplay 14pin to 16pin adapter compatible with Carter's 14pin old truck transfer line OBD2 connector and CAT 14PIN ET diagnostic extension plugs. Straightforward inline connection that makes modern diagnostic tools usable on legacy ports. Compatibility reminder Intended for use with Carter's 14pin old truck transfer line OBD2 connectors and CAT 14PIN ET diagnostic extension plug setups. Verify connector type on the vehicle before . Easy to use, purposebuilt for diagnostic work, and ideal for workshops, fleet service teams, and field technicians who need to bridge legacy truck ports with contemporary CAT diagnostic equipment.