No Crank, No Start, power to accessories?

Tiny
BOHANNON
  • MEMBER
  • 2005 FORD F-150
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
Replaced the battery, starter, alternator, ignition switch, and neutral safety switch. I've checked all fuses and relays. When I check the volts at the starter, I get voltage on the power post, but I am losing power on the S terminal. I'm stumped and don't know what else to do.
Friday, September 1st, 2023 AT 5:49 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,469 POSTS
We need to see if the fuse #f102 is getting power, this guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check it with the key on, if the fuse has power and is good let's swap out the starter relay.

Here is a guide to test it or just replace it:

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

Here is the starter wiring diagrams so you can see how the system works.

This guide may help as well:

https://www.2carpros.com/articles/starter-not-working-repair

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Saturday, September 2nd, 2023 AT 4:46 PM

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