FORD 2010 E-450 v.2 - Manual (Page 226)

Press in the flasher control and all front and rear direction signals will
flash. Press the flasher control again to turn them off. Use it when your
vehicle is disabled and is creating a safety hazard for other motorists.
Note: With extended use, the flasher may run down your battery.
FUEL PUMP SHUT-OFF SWITCH
(DIESEL-POWERED AND STRIPPED CHASSIS VEHICLES ONLY)
This device stops the electric fuel pump from sending fuel to the engine
when your vehicle has had a substantial jolt.
After an accident, if the engine cranks but does not start, this switch
may have been activated.
On diesel-powered vehicles, this
switch is located in the front
passenger’s footwell, by the kick
panel.
Roadside Emergencies
226
2010 Econoline (eco)
Owners Guide, 2nd Printing
USA (fus)