Fuel pump relay is not getting power

JAEDAV12

MEMBER
2000 MERCURY MARQUIS
4.6L
V8
2WD
AUTOMATIC
100,000 MILES

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.

5 Replies

JACOBANDNICKOLAS

MECHANIC
108,179 POSTS

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

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Friday, August 7th, 2020 AT 10:10 PM

JAEDAV12

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46 POSTS

The fuel pump relay is good but doesn’t click. Checked for voltage but there is none where the relay is located.

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Friday, August 7th, 2020 AT 10:18 PM

JACOBANDNICKOLAS

MECHANIC
108,179 POSTS

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

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Friday, August 7th, 2020 AT 11:19 PM

JAEDAV12

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46 POSTS

The fuse is good.

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Saturday, August 8th, 2020 AT 7:17 AM

JACOBANDNICKOLAS

MECHANIC
108,179 POSTS

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