Fuel pump relay location

Tiny
STING58
  • MEMBER
  • 2003 FORD MUSTANG
  • 220,000 MILES
We replaced the fuel pump in the gas tank and gas filter, spark plugs and check the fuels and cant locate the fuel pump relay we have purchance it but cant locate it. To replace it. The car motor turn but dont start thats why we think its electric
the part is Call a relay relavadlor Item # 19279 by duralast
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Tuesday, May 28th, 2013 AT 6:01 PM

24 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
The constant control relay module controls the fuel pump, see pic for location. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, May 29th, 2013 AT 2:31 AM
Tiny
ANGIEDEBI
  • MEMBER
  • 1 POST
  • 2001 FORD MUSTANG
  • V8
  • 2WD
  • MANUAL
I have a 2001 mustang GT, 4.6 ang the fuel pump relay switch is bad I got a new one but I can not find where ford put it under the hood
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Wednesday, February 3rd, 2021 AT 2:50 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,699 POSTS
Look for a fuse box under the hood. Typically there is a cover to remove, and a sticker under that cover will show the locations of each fuse and relay. Check out the diagrams (Below). Please let us know what happens.
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Wednesday, February 3rd, 2021 AT 2:50 PM (Merged)
Tiny
COACHF23
  • MEMBER
  • 1 POST
  • 1999 FORD MUSTANG
  • 4 CYL
  • 2WD
  • MANUAL
  • 155,000 MILES
Where is the fuel pump relay located on my 1999 mustang 3.8 ltr. Coupe. The car wont start, and before I replace the fuel pump, my mechanic friend want to check the relay and he cant find it.
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Wednesday, February 3rd, 2021 AT 2:52 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Its in the CCRM constant control relay control module behind engine coolant resevoir
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Wednesday, February 3rd, 2021 AT 2:52 PM (Merged)
Tiny
JFLO284
  • MEMBER
  • 1 POST
  • 1999 FORD MUSTANG
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Where can I find the fuel pump relay on this vehicle
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Wednesday, February 3rd, 2021 AT 2:52 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You are looking for the constant control relay module- ( CCRM ) see below


https://www.2carpros.com/forum/automotive_pictures/12900_ccrm_1.jpg

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Wednesday, February 3rd, 2021 AT 2:52 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,544 POSTS
  • 1999 FORD MUSTANG
  • 6 CYL
  • 2WD
  • 106,000 MILES
1999 Ford Mustang mileage: 106,000. The other day my car stopped dead in the middle of the road. The computer gives me the 542 code. According to my repair manual, that means Fuel pump secondary circuit failure: ECM to ground motor. Now, I have no idea what that means.I'm trying to located the fuel pump relay switch to test it. The fuel pump, filter, and spark plugs have all passed their test. However, the manual doesn't mention the location of the relay. Where is the fuel pump relay located in a 91-2.3L Mustang?
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Wednesday, February 3rd, 2021 AT 2:52 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,544 POSTS
Hello,

The fuel pump relay is located in the CCRM under the hood on the right side. Here is a guide to test it with the location of the relay below.

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

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, February 3rd, 2021 AT 2:52 PM (Merged)
Tiny
BARTMAN007
  • MEMBER
  • 5 POSTS
  • 1999 FORD MUSTANG
  • 3.8L
  • 6 CYL
  • MANUAL
  • 100,000 MILES
No ground to fuel pump. I can make pump run with grounding jumper wire but car does not start. I'm trying to find out where the ground wire in the fuel pump wiring finds it' ground/safety relay? Run relay? All the diagrams just show it going to ground.
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

The fuel pump relay in your vehicle is contained in module called the Constant Control Relay Module in the right fender well under the splash guard. It also controls the hi speed engine cooling fan, low speed engine cooling fan,fuel pump, PCM and air conditioning compressor clutch. If you are supply power to your fuel pump and you still have a no start, then can you please confirm for me that you are getting spark. Please go to the link below to learn how.

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

Please get back to us with what you find out. I also included some vehicle specific things in the diagrams down below for you.

Thanks,
Alex
2CarPros
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
BARTMAN007
  • MEMBER
  • 5 POSTS
When we first hooked up/tapped into the connected fuel pump harass with manual ground lead we had 70 psi and I do not remember it changing while we were cranking it over. However, when it started and ran we noted the fuel psi at 20. I know this is low but don't believe it's keeping it from starting. My gut tells me it has something to do with where the ground wire finds it self to ground. Is there a relay or module or CPU on the grounding circuit? Can't find a detailed schematic.
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Okay, I got confused for a second because I own a 1997 supercharged mustang gt. Yours has a returnless fuel system, while mine has a return style fuel system. Hence my mistake. Okay, I have put some information for you in the diagrams below. Please go through it and let me know what you find out.

Thanks,
Alex
2CaePros
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
BARTMAN007
  • MEMBER
  • 5 POSTS
Okay, I did not get a chance to run your suggested test, but I do have more information when I go out and start the car after a few days I turn the key on and the check engine light comes on and its starts then I turn it off and try to start it again and no check engine light and it won't start this seems to be consistent, hooked up code reader to it, no codes KOER no codes KOEO using a Bosch code reader codes were read both when car was running and when it wont start, I did note that when I was reading individual sensors that fuel 1 was open and fuel 2 was n/a, okay, what do you think? Now I'm thinking it has something to do with the main computer at the kick panel passenger side floorboard. I was thinking ignition switch for a minute but I cycled the key many times trying to see if it was a shady connection there, I don't think that's it now. Too many things to do and not enough hours in the day to do them. By the way how is your day?
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
BARTMAN007
  • MEMBER
  • 5 POSTS
One more thing, can I change the computer from another car without reprogramming for chipped key? Thinking of grabbing one from the wrecking yard.
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

No. If you swap out Powertrain Control Module's (PCM) AKA, "computer", you must have the key reprogrammed to it or the Passive Anti Theft System (PATS) will not let your vehicle start.

Thanks,
Alex
2CarPros
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
BARTMAN007
  • MEMBER
  • 5 POSTS
Thank you.
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Wednesday, February 3rd, 2021 AT 2:58 PM (Merged)
Tiny
VALERIEHILL_FORDGIRL
  • MEMBER
  • 2 POSTS
  • 1993 FORD MUSTANG
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
I thought my fuel pump was bad but its not and im getting fire and everything is working right I just need to check the fuel relays but I cant find them on this car my other car has it under the driver seat but its a different year so if anyone knows please help me thank you
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Wednesday, February 3rd, 2021 AT 2:59 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
5.0L/302CID

Its located on item no. 29


https://www.2carpros.com/forum/automotive_pictures/12900_fuel_pump_relay_18.jpg

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Wednesday, February 3rd, 2021 AT 2:59 PM (Merged)
Tiny
MCNKC61
  • MEMBER
  • 3 POSTS
  • 1989 FORD MUSTANG
Electrical problem
1989 Ford Mustang V8 Two Wheel Drive Manual

89 mustang replaced fuel pump, relay, filter. Still fuel pump only runs when I jump the relay still no start.I heard it was important to have about ten gallons of gas only five for me, problem? It turns over just fine but wont start alot of problems with this on these cars I see need a little help please im almost frustrated to the point I dont want to look at my garage baby anymore
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Wednesday, February 3rd, 2021 AT 2:59 PM (Merged)

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