OBD Harnesses

A splitter can give you more physical OBD ports, but it doesn't guarantee that two devices can communicate or operate correctly at the same time. Compatibility depends on the vehicle, the devices, their power needs, and how they use OBD data. Check both devices and the splitter before combining them. If diagnostics or accessory behavior becomes abnormal, disconnect the secondary device rather than assuming simultaneous use is supported.

Choose by the connection job, not by the 16-pin plug alone. A pass-through harness keeps the OBD connection available while a supported accessory is connected. A splitter adds additional OBD ports. A vehicle-specific module is designed for a defined vehicle and accessory application. {{website}} carries all three types, so match the vehicle, accessory, and manufacturer instructions before deciding which connection piece you need.

No. Sharing the familiar 16-pin OBD-II connector doesn't guarantee that a harness, module, and accessory are compatible. {{website}}’s assortment includes general splitter-style adapters as well as AMP Research modules and harnesses intended for specific vehicle or accessory applications. Check the vehicle year, make and model, the accessory being connected, the required application or protocol, and the manufacturer’s instructions before buying the harness.