1999-2010 Ford Power Stroke Glow Plug Control Module Pigtail Set Fits Glow Plug Modules DY876 DY1600 YC3512B533AA YC3Z12B533AA Replacement pigtail wiring connectors for the Glow Plug Control Module, also known as the Glow Plug Relay or Switch Box on 6.0L, 6.4L and 7.3L Powerstroke Diesel engines made from 1999-2010. Over time the factory connectors tend to corrode or break down from the elements, causing intermittent and eventually total failure of the glow plug function. Includes 2 Pigtails 12" Length Fits the following applications (Diesel models only): FORD E-350 1999-2010 FORD E-450 1999-2010 FORD E-550 2002-2003 FORD ECONOLINE SUPER DUTY 1999 FORD EXCURSION 2000-2005 FORD F-250 SUPER DUTY 1999-2010 FORD F-350 SUPER DUTY 1999-2010 FORD F-450 SUPER DUTY 1999-2010 FORD F-550 SUPER DUTY 1999-2010 FORD F-650 2000-2008 FORD F-750 2000-2008