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Disconnect - Vehicles with 4.6L, 5.4L and 6.8L engine

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Simplified Battery Configuration - 4.6L, 5.4L, 6.8L
G03890347Courtesy of FORD MOTOR CO.
  1. Disconnect the primary battery ground cable.
    Fig 2: Disconnecting Primary Battery Ground Cable
    G03890348Courtesy of FORD MOTOR CO.
  2. Disconnect the auxiliary battery frame ground.
    1. Remove the ground bolt.
    2. Pull the cable away from the frame and make sure the cable does not contact the frame.
      Fig 3: Disconnecting Auxiliary Battery Frame Ground
      G03890349Courtesy of FORD MOTOR CO.