This is a pretty common Chrysler problem. First off- AutoZone is notorious for suppling the wrong parts. I would recommend going directly to the dealer. The Dealer will actually have the "upgraded" version in stock.
The radiator fan relay is a solid state type and is located on the front bumper reinforcement.
Ahhh. Once again, the AutoZone people strike again. The image I sent above is the CORRECT relay your trying to replace for P0480. Like I say, VERY common Chrysler problem. Might I suggest you go to a local NAPA parts store (if the Dealer isnt accessable) and try again... i bet the results are different!