Ford F81Z-12B533-AC - CONTROL UNIT Ford F250 F350 Super Duty 7.3 Diesel Glow Plug Relay Module OEM Motorcraft DY861 7.3 Diesel Glow Plug Relay Module 1999-2004 Ford F-250 F-350 F-450 F-550 Super Duty-With 7.3L Diesel Engines1985-1987 Ford Econoline E-Series Vans-With 6.9L Diesel Engines1988-2003 Ford Econoline E-Series Vans-With 7.3L Diesel Engines2000-2003 Ford Excursion-With 7.3L Diesel Engines1985-1998 Ford F-250 F-350-With 7.3L Diesel Engines1985-1998 Ford F-Super Duty-With 7.3L Diesel Engines F81Z-12B533-AC Motorcraft