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Where is the Fuel Pump Relay located?

Tiny
LUCY CORTéS
  • MEMBER
  • 2014 JEEP GRAND CHEROKEE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 160,400 MILES
I can’t find the fuel pump relay on my vehicle listed above, Limited 5.7L Hemi. I have looked in the manual as well as the fuse box and I cannot find it. Please help.
Sunday, May 1st, 2022 AT 7:01 PM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
The fuel pump relay on this vehicle is internal to the PDC and not a serviceable relay.

You can test the circuits like a normal relay, but the relay is inside the PDC.

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

Let us know what is going on with this one and if we can assist with what is needed as to the specific issue.

Thanks
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Monday, May 2nd, 2022 AT 5:53 PM
Tiny
LUCY CORTéS
  • MEMBER
  • 2 POSTS
When the car is cold and we try and turn it on, it cranks for about 5 seconds, or even longer and then it starts. The colder the engine is, the more it does it. It used to do it once in a while, now it’s every day.
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Monday, May 2nd, 2022 AT 9:00 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
This could be fuel related, so we need to start by checking the fuel pressure in order to confirm this.

This means we need to hook up a gauge and then check the pressure when it is doing the long crank.

Here is a guide that will help with this:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know what you find with this. Thanks
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Tuesday, May 3rd, 2022 AT 5:14 PM

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