2004 f150 wiring harness | eBay Find great deals on eBay for 2004 f150 wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 2004 Ford F150 New Style 4.6 Auto 2wd Engine Wire Wiring Harness Oem. Wiring Harness for 2004 Ford F-150 | OEM Ford Parts Home 2004 Ford F-150 Wiring Harness. Wiring Harness for 2004 Ford F-150. 2004 Ford F-150 Change Vehicle. Categories. All; Parts; Accessories; Automatic Transmission. Automatic Transmission; Engine Harness. 4L3Z-12A581-JA. 5.4 LITER. Discontinued. Discontinued. Newsletter Signup. Sign up to learn about our promotions and sales!