FORD 2013 Explorer v.2 - Manual (Page 337)

instrument cluster or center stack display to alert the driver that battery
protection actions are active. See the Information displays in the
Instrument Cluster and Entertainment systems chapters for more
information. These messages are only for notification that an action is
taking place, and do not necessarily indicate that an electrical problem
exists or that the battery requires replacement.
Electrical accessory installation
To ensure proper operation of the BMS, any electrical devices that are
added to the vehicle should not have their ground connection made
directly at the negative battery post. A connection at the negative
battery post can cause inaccurate measurements of the battery condition
and potential incorrect system operation.
Note: Electrical or electronic accessories added to the vehicle by the
dealer or the owner may adversely affect battery performance and
durability and may also affect the performance of other electrical
systems in the vehicle.
When a battery replacement is required, the battery should only be
replaced with a Ford recommended replacement battery that matches
the electrical requirements of the vehicle. After battery replacement, or
in some cases after charging the battery with an external charger, the
BMS requires eight hours of vehicle sleep time (key off with doors
closed) to relearn the new battery state of charge. Prior to relearning
state of charge, the BMS may disable electrical features (to protect the
battery) earlier than normal.
CHECKING THE WIPER BLADES
Run the tip of your fingers over the edge of the blade
to check for roughness.
Clean the wiper blades with washer fluid or water
applied with a soft sponge or cloth.
Maintenance 337
2013 Explorer (exp)
Owners Guide gf, 2nd Printing
USA (fus)