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Subaru Outback (2013–Present) Flat-4 Wiring Installation
A plug-and-play powered harness connects at Subaru’s factory trailer plug without cutting or splicing. The connector is behind the driver-side felt panel on 2013–2019 models and beneath the passenger-side cargo area on 2020+ models. The module is grounded, fused, secured, and tested before all cargo trim is restored.
Installation Time: Up to 45 minutes
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1. Opening the Rear Cargo Area
The cargo floor panels, storage components, and necessary interior trim are removed carefully to reach the factory trailer-wiring connection.
All retained fasteners and panels are organized for factory-quality reassembly.
2. Accessing the 2013–2019 Factory Connector
On 2013–2019 Outbacks, the factory trailer connector is located behind the driver-side interior felt panel.
The cargo hook is removed, the plug is accessed, and the connector is repositioned correctly for the vehicle-specific harness.
3. Accessing the 2020–Present Factory Connector
On 2020 and newer Outbacks, the factory connection is beneath the passenger-side cargo area.
The trunk sill and necessary interior fasteners are removed to reach the factory plug without cutting or splicing the vehicle’s wiring.
4. Connecting and Grounding the Powered Harness
The plug-and-play powered harness connects directly to Subaru’s factory trailer plug.
The system is grounded securely to a clean metal point on the vehicle body, supporting reliable trailer-light operation and protecting the factory electrical system.
5. Mounting the Converter, Fuse, and 4-Flat
The powered converter module is mounted securely in the protected cargo area and a fuse is installed for circuit protection.
The 4-flat connector is routed neatly to the rear hatch opening for convenient trailer connection and protected interior storage.
6. Testing and Factory-Quality Reassembly
The trailer-light circuits and ground are checked for reliable operation before the cargo area is closed.
Interior trim, cargo panels, storage pieces, the trunk sill, and retained fasteners are reinstalled carefully so the Outback’s interior looks factory when complete.