+3 Engine Wiring Harnesses for 7.3l 1999 E99 Ford Powerstroke F250-F550 Excursion KB-7.3lEWH-F81Z-12B637-BA $266.95 In stock Quantity: 1 Add to Bag Product Details Cross Reference:: F81Z-12B637-BA Complete Engine Wiring harness for 7.3 Early 1999 Ford Powerstroke Engines. Fits: Early 1999 7.3l Ford Powerstroke engines. Replaces OE#: F81Z-12B637-EA Save this product for later Favorite