Relay and fuse box location

Tiny
KLMYRIC
  • MEMBER
  • 1987 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 201,569 MILES
How can I tell if my fuel pump is gone bad or if I have a relay problem, where is the relay box located?
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Monday, January 25th, 2010 AT 10:55 AM

2 Replies

Tiny
KASEKENNY
  • EXPERT
This could be a relay issue but the best way to check is find out if the fuel pump has power or just remove the relay and jump it to see if the pump comes on.

Here are a couple guides that will show more info on how to do this:

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

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Below is the info from the manual on the location of the relay and fuses. Plus the wiring diagrams that will give more detail on this.

Please let us know if you have other questions. Thanks
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Wednesday, July 21st, 2021 AT 5:11 PM
Tiny
DANNY L
  • EXPERT
Hello, I'm Danny.

If The relay turns out to not be the problem here are instructions on how to replace the in-tank electric fuel pump which is mounted inside the fuel tank. Here is a tutorial showing how to replace an in-tank electric fuel pump:

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

I've attached picture steps below on how to remove and replace both the fuel tank and fuel pump on your car. Hope this helps and thanks for using 2CarPros.
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Thursday, July 22nd, 2021 AT 6:56 PM

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