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The Metra Electronics 70-5520 is a wiring harness designed to simplify the installation of an aftermarket car stereo in select Ford vehicles. The harness connects to the factory wiring and allows the user to avoid cutting and splicing the original wires, which can be time-consuming and potentially damaging.
The 70-5520 harness is compatible with many Ford models from 2003 to 2010, including the Ford Expedition, Explorer, F-150, and Mustang. It features color-coded wires that match the aftermarket stereo's wiring, making it easy to connect the two systems without confusion.
The harness also has an optional built-in amplifier retention circuit sold separately, allowing the user to retain the vehicle's factory amplifier when upgrading to an aftermarket stereo. This is particularly useful for those who want to maintain the original sound quality of their vehicle's audio system.
Allows installation of an aftermarket radio using the existing factory wiring and connectors. No cutting of factory wiring is needed.