Amazon.com: EWLSAC Glow Plug Control Module Switch and Glow Plug Harness with 8 pcs Glow Plugs For Ford E350 F250 F350 F450 F550 Super Duty E350 Club Wagon E450 Super Duty Excursion
P0683 Code: Glow Plug Control Module to PCM Communication Circuit - In The Garage with CarParts.com
How to replace the Glow Plug Control Module in A Diesel pick up - YouTube