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Simplify electrical installations with AMP Research pass-through harnesses. These plug-and-play harnesses will make connections easier and double your accessory abilities—they're factory-wired solutions without having to tap into factory wires. The AMP Research PowerStep pass-through harness will give you two OBD-II under your steering column. Adding a second OBD-II port in your vehicle will allow you to have multiple accessories at once. Also with the AMP Research PowerStep plug and play pass-through harness you can do a diagnostic without unplugging your AMP running boards.