Fuel pump relay is not getting power

2000 MERCURY MARQUIS
100,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
Avatar
JAEDAV12
  • MEMBER
  • 46 POSTS
So recently the car wouldn’t crank so we assumed the culprit was the fuel pump. Went in and replaced that and notice the pump wasn’t coming on checked all connections at the pump and everything was good. Went to the relays swapped them around and they worked but for some reason when the key is turned on the relay doesn’t click at the fuse block that the fuel pump relay is on.
Aug 7, 2020 at 8:17 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

I'm not sure I understand what you mean. The fuel pump relay is on but doesn't click. Can you explain? As far as the fuel pump relay, it receives power from fuse 1 in the battery junction box. See pic 1. Is that fuse good? Does the fuse have power?

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

Let me know.

Joe
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Aug 7, 2020 at 10:10 PM
Avatar
JAEDAV12
  • MEMBER
  • 46 POSTS
The fuel pump relay is good but doesn’t click. checked for voltage but there is none where the relay is located.
Aug 7, 2020 at 10:18 PM
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Do you mean the fuse? The fuse that powers the fuel pump relay is located in under hood fuse/relay box. See the above pic. It is fuse 1.

Joe
Aug 7, 2020 at 11:19 PM
Avatar
JAEDAV12
  • MEMBER
  • 46 POSTS
The fuse is good.
Aug 8, 2020 at 7:17 AM
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Okay, if the fuse is good and there is power both in and out of the fuse, then there is a break down in the fuse box. If the relay isn't getting power, what I suggest is to disconnect the battery and remove the relay box to check under it for damage or something which has failed.

Let me know what you find.
Joe
Aug 8, 2020 at 9:19 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.