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Hyundai Palisade (2020–2022) Flat-4 Wiring Installation
The 2020–2022 Palisade uses an OEM-compatible connector behind the driver-side rear bumper for a clean plug-and-play flat-4 installation. We disconnect vehicle power, open the rear underbody access area, connect and secure the protected converter harness, route the 4-flat neatly to the hitch, test every lighting function, and restore the vehicle.
Vehicle Coverage: 2020–2022 Hyundai Palisade
Connection: OEM rear socket
Output: 4-Way Flat
Installation Time: Up to 30 minutes
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1. Disconnecting Power and Preparing the Harness
The negative battery terminal is disconnected and secured away from the battery to protect the vehicle's electrical system. The specified fuse is installed in the custom harness before the rear connection is opened.
2. Opening the Driver-Side Rear Access Area
The plastic shroud beneath the driver-side rear bumper is removed by releasing its push fasteners and retaining hardware. This exposes the Palisade's factory trailer-wiring connector without disturbing the taillights or interior cargo trim.
3. Connecting at the OEM Rear Socket
The protective dust cap is removed from the vehicle connector without damaging its locking tabs. The OEM-compatible harness is seated fully in the factory socket and checked to confirm that the connection is locked.
4. Mounting the Converter and Routing the 4-Flat
The circuit-protected converter is secured to a clean, protected flat surface near the factory connection. The 4-flat lead is routed across the rear of the vehicle to the hitch, and loose wiring is supported away from heat, road debris, sharp edges, and moving parts.
5. Testing, Protecting, and Reassembling the Vehicle
Running lights, brake lights, both turn signals, and ground operation are tested at the 4-flat connector. The dust cover is installed, the rear shroud and its hardware are restored, and the negative battery terminal is reconnected.