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Ford F-350 5.4 gas engine, no power to fuel cut off switch,

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fuel pump fuse good........is there...
Ford F-350 5.4 gas engine, no power to fuel cut off switch, fuel pump fuse good........is there a fuel pump relay anywhere ?
Submitted: 2 years ago.Category: Ford
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Answered in 1 minute by:
2/28/2016
Ford Mechanic: Scott W., Ford Technician replied 2 years ago
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,629
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.
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Hello my name is Scott

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Ford Mechanic: Scott W., Ford Technician replied 2 years ago

What year f350 do you have?

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Customer reply replied 2 years ago
2004 sorry
Ford Mechanic: Scott W., Ford Technician replied 2 years ago

Ok, let me look

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Ford Mechanic: Scott W., Ford Technician replied 2 years ago

Ok this relay is built internal to the central junction box and is not serviceable.

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Customer reply replied 2 years ago
if I have no power to cut off switch, the only other thing it can be is relay ?
Ford Mechanic: Scott W., Ford Technician replied 2 years ago

Do you have any trouble codes stored in PCM?

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Ford Mechanic: Scott W., Ford Technician replied 2 years ago

Also there is only power at the inertia switch for 2-3 seconds when key is initially turned on.

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Customer reply replied 2 years ago
No, battery went dead and lost them all. I started off thinking it was fuel pump, replaced pump and filter, now I found out no power to cut off switch. So I'm thinking it has to be fuel pump relay, just want your opinion before I buy a fuse box
Ford Mechanic: Scott W., Ford Technician replied 2 years ago

Before anything I would do a KOEO self test with a scan tool, this test will test the fuel pump circuit and will set a code if there is a problem, there is no sense buying a fuse panel assembly if it won't fix the problem. I think I maybe have replaced 1 one these that I can ever remember for this concern, so a self test is a must. Just trying to save you some money in the long run.

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Ford Mechanic: Scott W., Ford Technician replied 2 years ago

I would check all the fuses under the hood and inside first, just to be sure there isn't a blown one for the PCM.

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Customer reply replied 2 years ago
Ok thank you
Ford Mechanic: Scott W., Ford Technician replied 2 years ago

If the PCM isn't powering up, the fuel pumpwon't run either since this relay is commanded by the pCM

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Ford Mechanic: Scott W., Ford Technician replied 2 years ago

Thank you for your business!!

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Customer reply replied 2 years ago
It started acting up an would cut off going down the road.....after about 2 months it just stopped running altogether
Ford Mechanic: Scott W., Ford Technician replied 2 years ago

From the description it sounds like it could be a wiring issue. Make sure you have 12 volts to the fuel injectors and make sure the check engine light comes on when the key is turned on also. This let you know the PCM relay is providing power to the computer.

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Ford Mechanic: Scott W., Ford Technician replied 2 years ago

If I have answered all your questions, please take the time to rate my service help as this is how we are paid, thank you.

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