+3 Engine Wiring Harnesses for 7.3l 2002-2003 Ford Powerstroke F250-F550 Excursion KB-7.3lEWH-F81Z-12B637-FA $260.95 In stock Quantity: 1 Add to Bag Product Details Cross Reference:: F81Z-12B637-FA Complete Engine Wiring harness for 7.3 2002-2003 Ford Powerstroke Engines. Fits: 2002-2003 7.3l Ford Powerstroke engines with automatic transmission. Replaces OE#: F81Z-12B637-FA Save this product for later Favorite