For truck owners who’ve installed AMP Research Powersteps, the reliance on the OBD2 port for operation can sometimes be a point of frustration, especially when you need that port for other devices like performance monitors or diagnostic tools. Many users, like yourself, seek a cleaner, more direct wiring solution to free up their OBD2 port. This guide will walk you through how to wire your AMP Research Powersteps directly, bypassing the OBD2 connection and ensuring seamless operation.
The original design of AMP Research Powersteps often involves plugging a module directly into your vehicle’s OBD2 port. This setup works, but it becomes problematic when you want to use devices like the Edge Insight or other OBD2-dependent accessories simultaneously. Using OBD2 splitters can sometimes lead to unreliable performance and potential conflicts, as highlighted by users experiencing irregularities with their Insight monitors when used with a splitter for Powersteps.
Fortunately, AMP Research Powersteps can be wired to function without utilizing the OBD2 port at all. The key is to tap into your vehicle’s door trigger circuits. This method not only frees up your OBD2 port but also provides a potentially more reliable trigger for your Powersteps, directly responding to door opening and closing.
The principle behind this alternative wiring is simple: instead of relying on the OBD2 port for signals, we use the door jamb switches. These switches are designed to activate when a door opens, completing a ground circuit. By connecting your AMP Powerstep controller to these door switch circuits, the steps will deploy and retract in sync with your doors, just as if they were connected via the OBD2 port.
Here’s how you can achieve this OBD2 bypass wiring:
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Identify Your AMP Controller Wiring: Locate your AMP Research Powerstep controller. You’ll need to identify the wires that are intended to receive door trigger signals. Refer to your AMP Powersteps installation manual for the specific wire colors for your controller. While wiring colors can sometimes vary, the principle remains the same.
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Locate Door Jamb Switch Wires: You need to find the wires from your door jamb switches that signal when a door is opened. These wires are typically grounded when the door opens. You can use a multimeter to verify which wire from your door switch provides a ground signal when the door is opened. Alternatively, consult your Ford F350 Lariat’s wiring diagrams for the door switch circuits.
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Connect Door Trigger Wires: Splice the door trigger wires from your AMP controller to the corresponding door jamb switch wires. You’ll need to do this for each door you want to trigger the Powersteps. Ensure you are making good, secure wire connections. Soldering and using heat shrink tubing is recommended for long-lasting, reliable connections, especially in the harsh undercarriage environment of a truck.
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Power Source: Your AMP Powersteps will still need a power source. This is typically connected to the vehicle’s battery or a suitable 12V power source. This power connection is independent of the door trigger wiring and remains the same regardless of whether you use the OBD2 port or door switch method for triggering.
Refer to the wiring schematic provided by AMP Research or similar diagrams available online to ensure you are connecting the correct wires. Double-check the wiring for your specific AMP controller model as wire colors can change between different versions or production runs.
It’s important to note that while some discussions might mention using a Ford controller, this is generally not applicable to aftermarket AMP Research Powersteps. The motors and sensor systems used in OEM Ford steps and aftermarket AMP steps are different. Attempting to use a Ford controller with aftermarket AMP steps is unlikely to work and could potentially damage your system.
By wiring your AMP Research Powersteps directly to the door switches, you eliminate the need for the OBD2 port connection and any potential issues associated with splitters. This method provides a clean, reliable, and OEM-like integration for your aftermarket Powersteps, ensuring they function flawlessly while freeing up your OBD2 port for other essential devices. Always ensure you consult your vehicle’s wiring diagrams and the AMP Research Powersteps installation guide for the most accurate and safe wiring practices.
