FORD 2006 E-450 v.1 - Manual (Page 158)

Note: With extended use, the flasher may run down your battery.
FUEL PUMP SHUT-OFF SWITCH
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.
Except for commercial stripped
chassis vehicles, this switch is
located in the front passenger’s
footwell, by the kick panel.
2006 Econoline (eco)
Owners Guide (post-2002-fmt)
USA (fus)
Roadside Emergencies
158