Disconnect & Connect Procedure
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
On vehicles with dual batteries, disconnect and reconnect battery cables in specified order. To disconnect batteries, disconnect negative battery cable from secondary battery, located on driver's side of engine compartment, then disconnect negative battery cable from primary battery, located on passenger's side of engine compartment. To connect batteries, connect negative battery cable to primary battery, located on passenger's side of engine compartment then connect negative battery cable to secondary battery, located on driver's side of engine compartment.