fuel system wiring
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fuel system wiring
I'm looking for a diagram of the dual tank system (fuel pump, sending unit, selenoid and tank switch, and fuel gage) for a E350 cutaway 1986 with 460 engine.
I have a sending unit problem on the front tank and would like to make some electric tests before dropping the tank.
Thank you.
I have the haynes and the colors aren't the same as mine.
I have a sending unit problem on the front tank and would like to make some electric tests before dropping the tank.
Thank you.
I have the haynes and the colors aren't the same as mine.
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Joined: Jan 2001
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They aren't the same as this diagram?
http://i54.photobucket.com/albums/g9...83FuelElCT.gif
Here's a nice long thread we had dealing with a pickup.
https://www.ford-trucks.com/forums/s...d.php?t=504343
If you want to test to see if it's the sending unit, find the sending unit wire on the front tank(darkblue/yellow) and disconnect it. Make sure the switch is in the front tank position, and the key is in run(engine can be off). While someone is watching the fuel gauge, ground the sending unit wire, and then take it off ground and let it hang in the air. If the wiring and the gauge are ok, the gauge will swing back and forth everytime you ground and unground the wire.
If you have the system like the diagram above, you have a motorized valve that does the sending unit switching. If the valve is bad, it will make the above test fail, even though the gauge and the wiring may be good.
http://i54.photobucket.com/albums/g9...83FuelElCT.gif
Here's a nice long thread we had dealing with a pickup.
https://www.ford-trucks.com/forums/s...d.php?t=504343
If you want to test to see if it's the sending unit, find the sending unit wire on the front tank(darkblue/yellow) and disconnect it. Make sure the switch is in the front tank position, and the key is in run(engine can be off). While someone is watching the fuel gauge, ground the sending unit wire, and then take it off ground and let it hang in the air. If the wiring and the gauge are ok, the gauge will swing back and forth everytime you ground and unground the wire.
If you have the system like the diagram above, you have a motorized valve that does the sending unit switching. If the valve is bad, it will make the above test fail, even though the gauge and the wiring may be good.
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Bagbyknoter
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Sep 18, 2011 09:23 PM
