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2005 mustang 4.0 testing fuel pump driver module
2005 mustang 4.0 testing fuel pump driver module








2005 mustang 4.0 testing fuel pump driver module

If you are testing and the truck has not started, the PCM will shut off the Fuel pump after 5 seconds ( 8 ? ) of not having started. The fuel pump relay coil is powered by the PCM power relay. The fuel pump relay normally open contact is powered by Fuse #34 ( this fuse also feeds the PCM ).

2005 mustang 4.0 testing fuel pump driver module

The PCM is also connected to the fuel pump driver module The fuel pump is powered from the Fuel pump relay ( non serviceable in the Cab fuse panel ) to the fuel inertia switch to the fuel pump driver module. If it is a New body style, have you checked / replaced the fuel pump driver module ? This is on the cross member by the spare tire, and some times they get corroded and crack. Is this a 2004 New Body style or 2004 Heritage / Lightning ?

2005 mustang 4.0 testing fuel pump driver module

Have you checked the fuel inertia switch in the passenger side kick panel ? Not sure what secondary fuel mod you are posting about, can you explain what this is ?










2005 mustang 4.0 testing fuel pump driver module