3 Powerstroke injector wiring harness covers and helps fix what is often a troublesome area. There are two designs of this wiring. The early design fits 1994 - 1997 and has TWO electrical connectors along the top edge of each valve cover. The late design fits 1997 - 2004 and has ONE electrical connector at the top of each valve cover. 7.3 Powerstroke Injector Wiring Harness | 7.3 Valve Cover Was this helpful? GLOW PLUG & INJECTOR WIRE HARNESS PIGTAIL 7 7.3 Michigan Motorsports 7.3 L Diesel Powerstroke Valve Cover Gasket, Includes 8 Glow Plugs, Relay, Plus Injector Glow Plug Harness Fits Ford 7.3 F250 F350 1997-2003 3.2 out of 5 stars 4 $139 Ford 7 Powerstroke Diesel Injector Harness 18300844C93 Valve cover gasket for the 99-03 Ford 7 Powerstroke Diesel Injector Harness, part number 18300844C93, Ford Part number F81Z-9D930-AB.