1 x 2in1 OBD Adapter Cable for Harley 4pin 6pin. This adapter converts a standard 16 pin OBD2 type plug to the Harley Davidson OBD 6Pin/4pin plug for plugging into your motorbike diagnostic socket. You can use it with a standard OBD2 diagnostic code reader (wired or wireless) for code reading, diagnostic data and resetting.