The AMP Research® PowerStep™ Pass-Through Harness is the ultimate solution for AMP Research Powerstep users requiring an additional OBD-II port for plug-and-play accessories. This product plugs directly into the OBD-II port and provides two leads for OBD-II accessories, including [programmers](https://realtruck.com/c/performance/performance-programmers-monitors/programmers-tuners/), AMP Research PowerSteps, and more. Adding a second OBD-II port to your vehicle enables the simultaneous usage of multiple OBD-II accessories. Also, with the AMP Research PowerStep Pass-Through harness, you can effortlessly scan for DTCs (Diagnostic Trouble Codes) without unplugging your AMP running boards. The AMP Research PowerStep Pass-Through Harness installs in seconds with AMP's easy step-by-step instructions. Each lead features four pre-drilled mounting holes, making cable management a breeze. If you're looking to install AMP PowerStep running boards without losing OBD-II access, invest in an AMP Research PowerStep™ Pass-Through Harness. | AMP Research PowerStep PassThru Harness 76404-01A