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No Power to Fuel Pump on E350 Cutaway with 460

 
  #16  
Old 07-11-2011, 04:26 PM
synergy141
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Ok So I still havn't figured out this problem. I started following the fuel pump red wire and I removed some electrical tape and found 3 wires soldered together with 1 going to the fuel pump, 1 going to the fuel pump relay and 1 wire just hanging there not attached to anything with a connector at the end. I applied power to the soldered area and I could hear the fuel pump buzzing. I'm just wondering if the wire with the connector at the end should be plugged into something or if it's intentionally left as a spare. I tried looking to see if it could plug into anything but could not see anywhere it may go.



 
  #17  
Old 07-11-2011, 05:10 PM
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Was there a stripe on those wires? If so what color?

Here try this Diagram:


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  #18  
Old 07-11-2011, 06:02 PM
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All the wires that are soldered together are all red with a black stripe
 
  #19  
Old 07-11-2011, 06:11 PM
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You have either an open fuse #3, open Oil Pressure switch or the Ignition switch is not powering the circuit.

Does Fuse #3 have power on it with the key on?
If so jumper the oil switch as in the photo above and turn on the key.
Did the Fuel relay close and the in-tank fuel pump run?
 
  #20  
Old 07-11-2011, 11:27 PM
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Oil Pressure Switch was it! I jumped it and she fired up right away! Thanks guys for your help!
 
  #21  
Old 12-04-2011, 03:11 PM
Lodlaiden
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Thank You All!

I was experiencing a new start and die problem yesterday/today.
The wire diagrams and discussion helped me troubleshoot.

Thanks!
Lodlaiden

85 F250 460
 
  #22  
Old 05-10-2013, 11:39 AM
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I love this web site. I have chased every thing from start to finish and have finaly got the system up and running. Fuse 4 aux tank kept blowing on my unit which caused one fuel tank to quit. Fuel switch on dash had to be changed. After getting the right wiring diagram and installing a new selector valve. Found out that the front tank fump worked but didn't pump. New pump went in and everythiing works. Two years is has taken to chase all the problems down.
 
  #23  
Old 08-24-2013, 06:41 PM
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Hello: I have been following this for awhile as my 87 Ford E350 with 460 carb/single tank was doing the same, run for 20 secs and stop.

I jumped the oil pressure switch and sure enough there was proper power through the relay.

Changed the oil pressure switch part no# SW -1592 (Ford part # same as mustangs as they had no part number for the 87 E350) and of course they also did not have the relay but they had the number for the 4 prong relay
Fuel relay E6UZ-9C392-B “Ford #” or RY610 Benson Auto supply
I got the RY610 relay at a jobber and it list as a seat belt relay just in case you wonder when they type the number in.
The relay works fine and the RV runs like a top hope this helps someone else as I would like to thank SubFord for all the insight.
From a future Canadian Snowbird planning to go south over the next few winters!!!!!
Uncletom
 
  #24  
Old 10-03-2018, 12:07 PM
Cuemyers
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Ford E350 1986 motorhome

Hi,
thanks for the info. I have a 1986 Ford E350 motor home. 460 engine single fuel tank with electronic fuel pump.
i am not getting power to fuel pump.
i jumped oil pressure switch and i could hear pump kick in and it started up.
i bought a new switch. Hooked it up and still no power to fuel pump.
i bypassed switch again and it gives me power.. can I just leave the switch bypassed?
thanks!
 
  #25  
Old 10-03-2018, 03:59 PM
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That oil switch is a safety to turn off the fuel pump if the engine is not running.
It sounds like you are not getting power from the starter relay while cranking or fuse link "R" is open.



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  #26  
Old 10-04-2018, 11:15 AM
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Thank you,
i apprecaite the help!
i will take a look at those when I get off work tonight.
 
 
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