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

2005 FORD MUSTANG

197,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC

BIGTRUCKGUY75

MEMBER
2 POSTS

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.

Apr 2, 2021 at 9:50 AM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 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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Professional Diagram for 2CarPros Members
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Apr 2, 2021 at 11:03 AM

BIGTRUCKGUY75

MEMBER
2 POSTS

Okay, thank you for your reply. I will look into that when I get the car back in the shop.

Apr 2, 2021 at 12:43 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

You are welcome.

Always glad to help.

Roy

Apr 2, 2021 at 1:09 PM