No Crank, No Start, power to accessories?

2005 FORD F-150

220,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC

BOHANNON

MEMBER
2 POSTS

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.

Sep 1, 2023 at 10:49 AM

STRAILER

✓Experienced Mechanic
55,247 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.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Sep 2, 2023 at 9:46 AM

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