Ford 2010 Explorer Owner's Manual page 314

Roadside Emergencies
The following relays are located on either side of the passenger
compartment fuse panel. See your authorized dealer for service of these
relays.
Fuse/Relay Location
Relay 1
Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle's main electrical systems from overloads.
WARNING: Always disconnect the battery before servicing high
current fuses.
WARNING: To reduce risk of electrical shock, always replace
the cover to the power distribution box before reconnecting the
battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Battery section of the Maintenance and Specifications chapter.
314
2010 Explorer (exp)
Owners Guide, 2nd Printing
USA (fus)
Description
Delayed accessory relay