Battery Location - Primary and Secondary F-550 Primary Battery Location F-550 Primary Battery Location F-550 Diesel Engine Compartment E-450 2004 and Older Models E-450 Diesel Primary Battery Location y E-450 2005 and Newer Models 2005 E-450 Primary & Secondary Slide Out Battery Compartment Located on Curb Side of Vehicle Under Floor Auxiliary Battery (curb side) for E-450 & F-550 (E-450 diesel shown) E-450 2004 and Older Models E-450 Diesel Engine Compartment Krystal Enterprises 28 RETURN TO MENU