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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

frame rail fuel pump

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Old Jan 27, 2006 | 01:36 PM
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Exclamation frame rail fuel pump
Can anyone tell me why the frame rail fuel pump would still hum after you shut off the motor and remove the key ? The only way to shut it off is to disconnect the battery . The truck is an 88 F250 351 motor , any help ?, any suggestions ?
 
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Old Jan 27, 2006 | 02:38 PM
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From: Easton,Ks
Sounds like the Fuel Pump Relay Contacts are welded together. Replace Relay.
 
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Old Jan 27, 2006 | 03:30 PM
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thank you were would I find the relay ?
 
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Old Jan 27, 2006 | 05:23 PM
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I'm not sure on an 88, look under the hood for a relay & fuse center.
 
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Old Jan 27, 2006 | 05:47 PM
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The fuel pump relay is the green relay mounted to the back side of the air filter box.
 
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Old Jan 27, 2006 | 07:02 PM
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thank you guys for the quick response the weather is going to be nice tomorrow I will try to figure that out, once again thank you
 
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