Where's the FUEL PUMP RELAY?

check the fuse box. There might be something for fuel there. Or the inertia switch in the trunk on the drivers side.

It's in the CCRM. Here is some info from the Ford service manual about how the fuel pump operates:


* The electrical system has a fuel pump control relay controlled by the powertrain control module (PCM) (12A650) which provides power to the fuel pump through an inertia fuel shutoff switch (9341) which is normally closed.

* The electrical system provides power to the fuel pump through two relays: fuel pump and powertrain control module relays. The power relays are located in the powertrain control module relay (PCM relay) (12B577). The CCRM is serviced as a unit. Current path depends on operating conditions.

* Contacts of both relays are open when the ignition switch (11572) is in the OFF position.

* The powertrain control module power relay is energized, closing its contacts, when the ignition switch is first turned to the ON position.

* Power is provided to the fuel pump relay and to a timing device in the powertrain control module.

* The fuel pump runs through the contacts of the fuel pump relay.

* If the ignition switch is not turned to the START position, the timing device in the powertrain control module will open the ground Circuit 57 (after approximately one second).

* Opening the ground circuit de-energizes the fuel pump relay (opening its contacts) which, in turn, de-energizes the fuel pump. This circuitry provides for pre-pressurization of the fuel system.

* The powertrain control module operates the fuel pump relay when the ignition switch is turned to START position to provide fuel while cranking.

* After the engine starts and the ignition switch is returned to the ON position, power to the fuel pump is again supplied through the fuel pump relay.

* The powertrain control module senses engine speed and shuts off the fuel pump by opening the ground circuit to the fuel pump relay when the engine stops or is below 120 rpm.


Rick

Is there any chance change Fuel pump RELAY or I have to change whole CCRM ???

subsricbing..

Slow5.0 said:

Is there any chance change Fuel pump RELAY or I have to change whole CCRM ???

Click to expand...

???