2001 Infiniti QX4 Car Stereo Radio Wiring Diagram Whether your an expert Infiniti electronics installer or a novice Infiniti enthusiast with a 2001 Infiniti QX4, a car stereo wiring diagram can save yourself a lot of time. One of the most time consuming tasks with installing an after market car stereo, car radio, car speakers, car amplifier, car navigation or any car electronics is identifying the correct color wires for a 2001 Infiniti QX4. Infiniti QX4 Stereo Wiring Harness - autozone Order Infiniti QX4 Stereo Wiring Harness online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.