If The Engine Cranks But Does Not Start Or Does Not Start After A Collision; Fuel Pump Shut-Off Switch - Ford Vehicle Owner's Manual

To prevent electrical shock, do not use
your heater with ungrounded electrical
systems or two-pronged (cheater) adapters.
For best results, plug the heater in at least three
hours before you start your vehicle. Using the
heater for longer than three hours will not
damage the engine, so you can plug it in at
night to start your vehicle the following
morning.
NOTE: Be sure to disconnect the engine block
heater before driving your vehicle.
If the Engine Cranks but Does
Not Start or Does Not Start After
a Collision

Fuel Pump Shut-off Switch

If the engine cranks but does not start or does
not start after a collision, the fuel pump shut-off
switch may have been triggered. The shut-off
switch is a device intended to stop the fuel
pump when your vehicle has been involved in a
substantial jolt.
Once the shut-off switch is triggered, you must
reset the switch by hand before you can start
your vehicle.
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