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Fuel Pump Relay?

Tiny
MKOHLA
  • MEMBER
  • 2001 FORD F-250
Electrical problem V8 Four Wheel Drive Automatic 62000 miles

Looking for the fuel pump relay on 2001 F250 5.4L engine turns over good but don't here fuel pump build up suspect fuel pump relay.
Wednesday, October 27th, 2010 AT 7:31 PM

19 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

This relay is in the power distribution center and there could be two relays if you have bi-fuel. Here is a guide to help you test the relay

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

It disconnects easily and it is the pink and black wire that goes to the pump you should have 12 volts while cranking or for 3 seconds after the key is turned on. Also check the inertia switch on the passenger side trim panel.

Here is the full fuse panel and relay location for your 2001 ford pickup save it in your favorites for future reference.

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Monday, February 12th, 2018 AT 7:32 PM
Tiny
CBAKA815
  • MEMBER
  • 1 POST
Thanks man I Love this site ;)
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Monday, February 12th, 2018 AT 7:33 PM
Tiny
KATYGRRL912
  • MEMBER
  • 4 POSTS
  • 2002 FORD F-250
  • V8
  • 4WD
  • AUTOMATIC
  • 450,000 MILES
Electrical problem
2002 Ford F250 V8 Four Wheel Drive Automatic 450000 miles

7.3 Diesel
I am not getting the fuel pump to come on. Wired direct to it and it came on. Turn the key and no fuel in the bowl. Can not find anyone that can come up with the Fuel Pump relay and its location. It is not in the fuse panel, not behind the radio does not show up any where.
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Hello and thanks for the donation!

Your vehicle's fuel pump relay is integral to the central junction box (CJB) an is NOT serviceable. If wiring, fuse and fuel pump have been tested OK then replacement of the CJB is suggested. A very poor design by Ford on this one if I do say so myself.
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
KATYGRRL912
  • MEMBER
  • 4 POSTS
I would say so, the CJB is not the PCM I take it. It looks to me that that is the total fuse/relay box under the dash.
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
That's correct. The CJB is NOT the powertrain control module (PCM). The CJB is the central junction box that is located behind the lower left side of the dash. So instead of jerking out one little relay and replacing it. You have to replace the ENTIRE box.
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
ERICHHAAG
  • MEMBER
  • 1 POST
Dear katygrrl912, did replacing the cjb fix your truck.I am having the same exact problem
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
RICARDO SANTOS
  • MEMBER
  • 1 POST
  • 2000 FORD F-250
Engine Mechanical problem
2000 Ford F-250 Two Wheel Drive Automatic 300000 miles

I'd like to locate fuel pump relay on vehicle
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
TECH1FORD
  • MEMBER
  • 102 POSTS
If you take the cover off the fuse box and look at the relays there are 9 spots for them it is the one fartest on the left in the middle
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The previous answer is completely incorrect.

The relay is located behind the radio on the one.
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
HAYSX308
  • MEMBER
  • 2 POSTS
  • 2002 FORD F-250
  • V8
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
Electrical problem
2002 Ford F250 V8 Four Wheel Drive Automatic 70000 miles

I need to know the location of the fuel pump relay. My truck wont start in the cold months, I have to turn the key on and off listening for the fuel pump to turn on. First when it wouldnt start I had to turn the key on/off untill the pump started. Now the pump start but truck wont. Thanks for the help.
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure the fuel pump could be failing
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Monday, February 12th, 2018 AT 7:34 PM (Merged)
Tiny
STUSAN
  • MEMBER
  • 1 POST
  • 2001 FORD F-250
Engine Mechanical problem
2001 Ford F250 V12 Four Wheel Drive Automatic 38000. Miles

where is the fuel relay unit located in this truck. Not the swith, the actual relay. No one can find it including the mechanic I am paying alot of money to! Snow storm coming and this is our plow truck. Please help
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Wednesday, November 25th, 2020 AT 8:36 AM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Your vehicle's fuel pump cut-off relay is in the bi-fuel power relay module ( in left rear of engine compartment ).

The fuel pump relay itself is located in the center of the dash.

The fuel pump speed relay is in the battery junction box.
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Wednesday, November 25th, 2020 AT 8:36 AM (Merged)
Tiny
RIVER
  • MEMBER
  • 2 POSTS
  • 1990 FORD F-250
  • 6 CYL
  • AUTOMATIC
Can anyone please tell me exactly where the R303 is on 1990 F250? Fuse box is under dash, driver's side and only fuses appear to be there. No obvious looking black box under hood, as I have seen on some vehicles. Please help, facing possibility of tow charges if I can't resolve the issue! Thanks!
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Wednesday, November 25th, 2020 AT 8:36 AM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
I take it your fuel pump is not coming on?

Read the guide below on testing relays, it will help

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Attached below you will find the relay locations (You need C133) and wiring diagrams for both single and dual tank
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Wednesday, November 25th, 2020 AT 8:37 AM (Merged)
Tiny
RIVER
  • MEMBER
  • 2 POSTS
Thanks for the reply, fixitmr. Yes, the fuel pump is not working. It had been recently replaced, along with new tank, and was working. But now does not 'hum' on the turn of the key. So, hoping the relay couldn't handle the new pump, rather than the pump being defective, though of course these days that can not be ruled out, unfortunately. But figured the 12 dollar relay should be a first step, rather than dropping the darn tank again.
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Wednesday, November 25th, 2020 AT 8:37 AM (Merged)
Tiny
CROSS.JANE07
  • MEMBER
  • 1 POST
  • 1986 FORD F-250
Electrical problem
1986 Ford F250 Automatic

Could you please tell me where the fuel pump relay is located?
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Wednesday, November 25th, 2020 AT 8:37 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Fuel Pump Cut-Off Relay On left side of firewall in engine bay.
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Wednesday, November 25th, 2020 AT 8:37 AM (Merged)

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