Fuel pump relay

Tiny
J.STIEG
  • MEMBER
  • 2003 BUICK CENTURY
  • 180,000 MILES
03 Buick Century 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.
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Monday, July 9th, 2012 AT 5:00 PM

5 Replies

Tiny
HMAC300
  • EXPERT
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
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
  • EXPERT
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
  • 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
  • EXPERT
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)

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