Fuel pump relay?

Tiny
HARPER051
  • MEMBER
  • 2000 CADILLAC DEVILLE
Where do I locate the fuel relay pump on my car?
Tuesday, September 9th, 2008 AT 1:28 PM

19 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
Hello,

Here is a guide to help you test the relay so when you find it 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.

Cheers, Ken
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Monday, February 19th, 2018 AT 2:20 PM
Tiny
NICK KOOL
  • MEMBER
  • 2 POSTS
  • 1990 CADILLAC DEVILLE
Where can I find the fuel pump relay? Car wont start I just put new fuel pump and it was running ok but now it wont start, I dont hear any noise from the pump when key is on, can you help?
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

Here is a guide to help you test the relay with the fuel pump relay location 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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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
PATLEE
  • MEMBER
  • 1 POST
  • 1986 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 94,000 MILES
Where is it located? I'm installing a fuel pump and need to check the relay.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
Installing a new fuel pump relay is not to bad of a job. You can try direct power to the fuel pump to see if the pump works.

See below


https://www.2carpros.com/forum/automotive_pictures/12900_fuel_pump_relay_27.jpg



Here is the fuel pump location for a newer model

https://www.2carpros.com/questions/cadillac-deville-2000-cadillac-deville-fuel-pump-relay

Please let us know happens so it will help others.

Best, Ken
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
RICH001
  • MEMBER
  • 2 POSTS
  • 1986 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 140,000 MILES
My Cadillac runs perfect on all short trips, but after a longer trip (60 min. Or more), it will not start and is not getting fuel. I replaced the filter, and am now trying to locate the fuel relay switch. I have a manual that says it is beside the fuse box, which it isn`t. I went to the GM dealer, and they said it was on the firewall, which it isn`t. So I have a new relay and nowhere to put it.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check engine compartment relay block near the washer fluid reservoir.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
BUZZSAW
  • MECHANIC
  • 1,198 POSTS
Its on the firewall, under a black cover made of plastic,
there are 3 of them there, and some fuses, I dought this is your prob, is there a ck engine lite on? Need codes, push off and warmer on heater controls, and they display on heater assy, write them down, with out looking at it I would say your prob is in the distributor, cam sensor or pick up coil
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
RICH001
  • MEMBER
  • 2 POSTS
Thanks for your advice. I tried the codes the last time my car wouldn`t start. I got a BCM code 32 and 48. The code 32 is my MAP sensor circuit open. Should I be replacing it instaed of the relay. I found the relay behind the glove compartment.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
WOODYCOFF
  • MEMBER
  • 1 POST
  • 1989 CADILLAC DEVILLE
  • 210,000 MILES
Engine turns over but no fuel coming from injectors in throttle body
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Did you look for it underhood in a fusebox or on a bracket? Here's a pic from book. #3 is the pump relay.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
FIXITMR
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Looks to be under dash pass side interior.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
  • 1983 CADILLAC DEVILLE
  • 8,000 MILES
I need to find out what the fuel pump relay looks like. I found all of the relays under the dashboard and I don't know how to tell which ones which. I have got a 4.1 L V8 Cadillac Coupe Deville 1983 model. Its got digital fuel injection if that makes a difference. Thanks for your time.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It is on the rely center under the dash as you were describing.

Why are you looking for this? What is the issue?

Roy
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
I am looking for the fuel pump relay because there is a problem with fuel getting to the engine. The gas tank is not pumping gas at all. I am hoping that it is not the fuel pump. But I am trying to go with the cheapest things first. The reason I need to find the fuel pump relay is because I need to check it and see if it is plugged in or if there even is one.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
I am trying to find out and see if there is something electrical going on that could be stopping the car fuel pump from pumping
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Did you check under the hood in the relay block?
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
Could not find a relay block under the hood.
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Monday, January 6th, 2020 AT 3:10 PM (Merged)
Tiny
POPROCKS6301
  • MEMBER
  • 13 POSTS
On the car the relay block is on the fuzebox
the relay block is under the dash
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Monday, January 6th, 2020 AT 3:10 PM (Merged)

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