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Fuel pump relay location?

Tiny
J.STIEG
  • MEMBER
  • 2003 BUICK CENTURY
  • 180,000 MILES
Has no power at Fuel pump relay. The relay coil has power and comes on. There does not seem to be any power supply for the pump to run at the relay. I can supply fuel pump with voltage from the battery and fuel pump comes on.
Monday, July 9th, 2012 AT 5:00 PM

23 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You'll have to check to see if there is a bad connection at the computer or relay not letting it go on. It's a dark green wire with a white stripe. also check the ground wire, it connects to the trans stud.

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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Monday, July 9th, 2012 AT 7:15 PM
Tiny
J.STIEG
  • MEMBER
  • 352 POSTS
I'm saying that the relay coil is powered and comes on without a problem.

Problem is with the main feed coming into the relay.

Can you post a diagram? Thanks
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Monday, July 9th, 2012 AT 7:32 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Here is the diagram. Hope you have checked the fuse underhood, it's #35 if the pcm doesn't send a signal to the relay though it won't come on either.
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Monday, July 9th, 2012 AT 7:36 PM
Tiny
VNVET68-222
  • MEMBER
  • 2 POSTS
  • 2002 BUICK CENTURY
Electrical problem
2002 Buick Century 6 cyl Front Wheel Drive Automatic

car will not start, can use jump wire on fuel pump relay and it will start and run, what would cause the relay not to operate the fuel pump
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Saturday, March 30th, 2019 AT 12:05 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
The relay being bad itself, bad fuse, also check wiring to pump and relay.
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Saturday, March 30th, 2019 AT 12:05 PM (Merged)
Tiny
OGYVER
  • MEMBER
  • 1 POST
  • 1998 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 90,000 MILES
Car won't start, in fact died on the freeway. Towed it home and found I had spark. Disconnected the fuel lines at rail, tried to start car, no fuel came out either of the the lines. Fuel pump relay clicks so it is functioning. I took the fuel pump access plate off and the electrical connector at fuel pump only registers 5 volts when ignition or starter is on. Is this the correct voltage? If not what else in the circuit is dropping the voltage? Thanks.
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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Clicking relay does nt mean its supplying the power it means the trigger circuit is working. Here is a guide to help check the relay and the fuel pump relay location #19 in the diagrams below

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

Check out the diagrams (Below). Please run this test and get back to us.
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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am attaching an illustration of where this is located. Please reach out to us if you need more info. Thanks for visiting 2CarPros.
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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
H. MARTIN
  • MEMBER
  • 1 POST
  • 1996 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 13,500 MILES
Where is the fuel relay located and which one is it
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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
Under the hood, passenger side front, #3. Also, to be sure, compare wiring colors at relay connector.


https://www.2carpros.com/forum/automotive_pictures/512072_century_fuel_pump_relay_1.jpg




https://www.2carpros.com/forum/automotive_pictures/512072_buick_century_2_1.jpg

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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
JJAROS8400
  • MEMBER
  • 9 POSTS
  • 1994 BUICK CENTURY
  • 85,000 MILES
I have looked for the relay compartment under my hood, on the passenger side up behind the head light, but I cannot seem to locate it. Please help!
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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

Here is a guide and the location of the fuel pump relay and fuse which is right next to the relay.:

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.

Cheers
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Thursday, November 26th, 2020 AT 10:26 AM (Merged)
Tiny
PHOTO1
  • MEMBER
  • 1 POST
  • 1994 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 98,000 MILES
My 94 Buick Century died. Has spark so and starts briefly when I spray Starting Fluid through the air intake. The voltage at the fuel pump is plus or minus 9 volts so I suspect the fuel pump relay may be faulty. On March 26th "bluelightnin6" posted a diagram showing the location of the AC Compressor Clutch Relay but the diagram isn't a large enough file to enlarge and read where the Fuel Pump relay is located. Can someone post a larger file or offer any suggestions on what I should be looking for besides the relay.
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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
TWOSTEPPER
  • MEMBER
  • 42 POSTS
Use a gauge, check fuel pressure. Use a noid light to check for injector pulse. It shows an oil pressure switch in the fuel pump circuit. If the switch is functional and has voltage, once you crank it enough to bring up oil pressure, the switch closes. The pump will run, even with the relay unplugged. If multiple relays close to each other, look at the color of wires at the connector.


https://www.2carpros.com/forum/automotive_pictures/510352_century_fuel_pump_relay_1.jpg

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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
EAZBEA
  • MEMBER
  • 1 POST
  • 1994 BUICK CENTURY
  • 0.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 137,000 MILES
Where is fuel pump relay? Also reset switch?
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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,874 POSTS
"Inertia switches" are a Ford thing.
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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
WENDY28
  • MEMBER
  • 1 POST
  • 1991 BUICK CENTURY
Engine Mechanical problem
1991 Buick Century 6 cyl Front Wheel Drive Automatic

WHERE IS IT LOCATED?
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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum. The relay should be under the hood, passenger side front, relay pack. If your not sure which one it is, look at the wire colors at the connector. 3.3L engine


https://www.2carpros.com/forum/automotive_pictures/170934_buick_century_33_1.jpg

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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
BRUSSELL29
  • MEMBER
  • 1 POST
  • 1989 BUICK CENTURY
  • 3.3L
  • 6 CYL
  • 4WD
  • MANUAL
  • 90,000 MILES
Where is my fuel pump relay located?
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Thursday, November 26th, 2020 AT 10:27 AM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Here is the information you requested. It is located on the right hand front of the engine compartment. Here is a tutorial showing how to test a relay:

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

I've attached a picture below of its location on your vehicle. Hope this helps and thanks for using 2CarPros.
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Thursday, November 26th, 2020 AT 10:27 AM (Merged)

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