Many truck owners opt for aftermarket AMP running boards, also known as power steps, to enhance vehicle accessibility and aesthetics. Typically, these running boards are wired through the OBD2 port, a convenient but sometimes problematic connection point. If you’re looking to bypass the OBD2 port for a cleaner setup or to free it up for other devices like performance monitors, wiring your AMP running boards directly is a viable solution. This guide will walk you through how to achieve this, drawing upon expert community insights for a seamless installation.
Understanding the OBD2 Port Bypass
The standard installation for AMP Powersteps often involves plugging into the OBD2 port to draw power and receive door trigger signals. However, some users, like those employing OBD2-connected devices such as the Edge Insight monitor, might encounter conflicts or prefer a dedicated wiring solution. Direct wiring eliminates the need for splitters and potential signal interference, offering a more streamlined and reliable connection.
The Door Switch Wiring Method
A proven method to wire AMP running boards without the OBD2 port involves utilizing door switches. This approach leverages the existing door trigger mechanism in your vehicle, ensuring the running boards deploy and retract in sync with door operation. Here’s how it works:
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Door Trigger Signal: Instead of relying on the OBD2 port for door open/close signals, you tap into the door jamb switches. These switches provide a ground signal when a door opens, which can be used to activate the AMP running board controller.
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AMP Controller Wiring: Your AMP running board controller has input wires for door triggers. You will need to identify the correct wires (refer to your AMP Powersteps wiring diagram as wire colors can vary).
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Grounding Input: Connect the door jamb switch wire to the designated door input wire on the AMP controller. When the door opens, the door switch grounds the circuit, signaling the controller to deploy the running boards.
This method ensures that your AMP Powersteps function exactly as intended, deploying when a door opens and retracting when it closes, without any reliance on the OBD2 port.
Components and Wiring Diagram
To implement this OBD2 bypass, you will primarily need:
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Door Jamb Switches (if not already present or for adding to rear doors): These are standard automotive switches that activate when the door opens. You can often find OEM-style switches for a clean install.
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Wiring Connectors and Tools: Ensure you have appropriate connectors, wire strippers, and crimping tools for a secure and professional wiring job.
Refer to the wiring diagram below as a guide. Always double-check the wiring diagram specific to your AMP Powersteps controller as wire colors and configurations can differ between models and vehicle years.
Example of a door jamb switch installation for triggering AMP Powersteps.
Wiring schematic illustrating how to connect AMP Powersteps using door switches, bypassing the OBDII port.
Step-by-Step Installation Overview
While specific steps may vary depending on your vehicle and AMP Powersteps model, here’s a general outline:
- Locate Door Jamb Switch Wires: Identify the wires from your door jamb switches that trigger interior lights or door ajar indicators. These are your signal wires.
- Identify AMP Controller Door Input Wires: Consult your AMP Powersteps wiring diagram to find the wires designated for door trigger inputs.
- Connect Door Switch Wires to AMP Controller: Splice or connect the door jamb switch wires to the corresponding door input wires on the AMP controller. Ensure proper polarity and secure connections.
- Power and Ground: Connect the AMP controller power and ground wires to a suitable 12V source and ground point in your vehicle. These are typically independent of the door trigger circuit.
- Test Functionality: After wiring, carefully test the AMP running boards by opening and closing each door to ensure proper deployment and retraction.
Conclusion
Wiring your AMP running boards without relying on the OBD2 port offers a robust and clean installation solution, especially beneficial when using other OBD2 devices. By utilizing door trigger switches, you maintain seamless operation while freeing up your OBD2 port and potentially resolving any interference issues. Always refer to your specific vehicle and AMP Powersteps documentation for accurate wiring details and prioritize safety during installation.
