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Will not start, not getting power to fuel pump and no power from starter relay to starter

Tiny
BIGTRUCKGUY75
  • MEMBER
  • 2005 FORD MUSTANG
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 197,000 MILES
My car listed above won't crank over and the fuel pump is not turning on at the same time. The ignition switch will make the starter relay click. Jumped the starter and it will crank over. I'm not getting power to fuel pump and no power from starter relay to starter.

What do you think it could be?

Oh yeah, hooked up scanner and there are no major codes so it's not showing any security problems.
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Friday, April 2nd, 2021 AT 9:50 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

I attached a wiring diagram for you to view.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Check the relay for power at pin 85 with the key on. That is power for the control side of the relay. The ECM grounds pin 86 to send power to the starter.

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

The fact you have no fuel pump leads me to a possible bad ECM.

Roy
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Friday, April 2nd, 2021 AT 11:03 AM
Tiny
BIGTRUCKGUY75
  • MEMBER
  • 2 POSTS
Okay, thank you for your reply. I will look into that when I get the car back in the shop.
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Friday, April 2nd, 2021 AT 12:43 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Friday, April 2nd, 2021 AT 1:09 PM

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