Engine does not crank?

Tiny
OREO101
  • MEMBER
  • 2005 FORD EXPEDITION
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Hi Experts,

Battery is fine.
Just had it tested + I trickle charged 4 amp overnight.

I get no dash lights nothing.
I used a fusible link on positive battery cable.
Can I test that and how?

Fuse blown?

Thank you in advance if you can help!
Sunday, November 19th, 2023 AT 9:33 AM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,119 POSTS
Hi,

I need to know a little more. What do you mean by you used a fusible link on the battery?

As far as the issue is concerned, check to see if any of the fuses in the central junction box are receiving power. From what I'm seeing in the power distribution schematic, power is run directly to the CJB. The only place I'm seeing a fusible link is related to the alternator.

Let me know.

Joe

See pic below.
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Sunday, November 19th, 2023 AT 8:36 PM
Tiny
OREO101
  • MEMBER
  • 101 POSTS
Yes, the fusible link is directly after the post battery terminal.
I will check for power to fuses.
What is CJB?
If starter relay is bad could that be reason I have no dash lights, no headlights, no cranking, nothing at all.
Or could fusible link be the issue?
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Tuesday, November 21st, 2023 AT 7:19 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,119 POSTS
Hi,

If the relay is faulty, it would cause the no crank issue. However, not the other things you mentioned. I suspect the fusible link has failed and not sending power to the fuses. As far as CJB, that stands for central junction box. Sorry.

If possible, take a pic of the battery area where the fusible link is located and upload it for me to see. It may help me. When I look at the schematic, it doesn't show it.

Let me know what you find or if you have questions. Also, have a great Thanksgiving.

Take care,

Joe
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Tuesday, November 21st, 2023 AT 8:22 PM
Tiny
OREO101
  • MEMBER
  • 101 POSTS
Yes, the fusible link is right on the positive cable.
I don't know if it was factory installed or put there by previous owner?
I see a fusible link in the image you provided.
I will test tomorrow. Here is a picture.
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Wednesday, November 22nd, 2023 AT 6:34 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,119 POSTS
If that is running directly to the fuse box, first see if there is power to any of the fuses. If there isn't, check the fusible link for continuity.

Here is a link you may find helpful:

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

Note that the fusible links shown in the schematics are related to the charging system. I'm not sure if that is going directly to the fuse box or if a different one is. The large wire with no fusible link should run to the starter.

Let me know.

Joe
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Wednesday, November 22nd, 2023 AT 9:17 PM
Tiny
OREO101
  • MEMBER
  • 101 POSTS
I replaced the relay, no power still.
Look at the pictures.
Hi, I see that a large gauge wire comes off of positive terminal then split into 2 smaller gauge wires.
Then these terminate and 1 large gauge and 1 smaller gauge continue to alternator?
I need to check the continuity of all wires and will get back to you with results.
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Thursday, November 23rd, 2023 AT 10:42 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,119 POSTS
The larger gauge wire likely goes to the starter motor. If you have a smaller gauge wire with a fusible link, that is likely for the alternator.

If you want to skip a continuity test for the fusible links, check the black wire with an orange tracer and the orange wire with a light blue tracer at the alternator for power. You can use a test light for this. There should be battery voltage at all times.

What does the added wire go to? The one that has the aftermarket yellow connector.

Let me know.

Joe

See pic below.
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Thursday, November 23rd, 2023 AT 9:24 PM
Tiny
OREO101
  • MEMBER
  • 101 POSTS
I will check on where all wires go to.
The added red wire goes to driver's side firewall.
I need to find where that leads to also.
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Friday, November 24th, 2023 AT 4:52 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,119 POSTS
Let me know. Someone added that wire, so I'm not sure what it is for.

Take care,

Joe
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Friday, November 24th, 2023 AT 7:03 PM

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