Fuel pump not getting power, relay not getting power

2010 HYUNDAI ACCENT
143,000 MILES • 2.1L • 4 CYL • 2WD • AUTOMATIC
Avatar
BOWLINGMECH
  • MEMBER
  • 3 POSTS
The other day after driving around for a bit my car shut off. After some checking around I found that my fuel pump was not getting power. Checking all fuses (they’re good), and relays I couldn’t find any issue, until I tested the voltage going to my fuel pump relay. I don’t have any voltage going to relay and am stumped as to where I should start now, any help would be appreciated. Thanks.
Jul 13, 2019 at 12:32 PM
Advertisement
Avatar
SCGRANTURISMO
  • CERTIFIED EXPERT
  • 4,897 POSTS
Hello,

I have included wiring diagrams for your vehicle's fuel pump circuit, the fuel pump and the fuel pump relay. Please go through this wiring diagram and look at the fuel pump relay and let me know if you are not getting battery voltage at pin #1 or #3 or either of them. We can go from there.

Thanks,
Alex
2CarPros
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Jul 13, 2019 at 1:09 PM
Avatar
BOWLINGMECH
  • MEMBER
  • 3 POSTS
I don’t have any voltage there.
Jul 13, 2019 at 1:17 PM
Advertisement
Avatar
SCGRANTURISMO
  • CERTIFIED EXPERT
  • 4,897 POSTS
Hello again,

Okay, a relay is broken down into two separate sides, the control side and the power side. The control side has a switched power source coming into pin #3 (brown wire) which energizes the electromagnetic coil. When the electromagnetic coil gets energized it pulls the switch from the power side closed which has electricity coming into pin #1 from a "hot at all times" fuse and allows the electricity to continue on to the fuel pump from the now closed switch. As soon as the switched power going into pin #3 is switched off, the electromagetic coil deenergizes, and the switch on the power side opens, breaking the circuit and electricity that comes into pin #1 is interrupted. So let's check the Injector fuse(15A) in the fuse box on the left side of the engine compartment and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
Jul 13, 2019 at 1:35 PM
Avatar
BOWLINGMECH
  • MEMBER
  • 3 POSTS
Injector fuse is good, just checked it.
Jul 13, 2019 at 1:36 PM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
If I can jump in here. Can we test for spark? if the computer does not see the engine turning over it will not turn the fuel pump relay on. Here is a guide:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please run down this guide and report back.
Jul 15, 2019 at 2:52 PM