No start, no dash lights, nothing

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Sep 29, 2025 | 09:06 AM

#21

DJS

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Joined: May 2013

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From: Metrowest Boston

Quote:

Originally Posted by David4883

In an attempt to access the trunk/boot, I removed the panel under the rear of the trunk lid. The one that has the push button to open the trunk. I then removed the connector to the push button that triggers the trunk latch to open. I stuck a wire in both sides of the wired connector. Then the other end of the wires to a fully charged motorcycle battery. Nothing.

There’s some chance that will have damaged the central junction box. The switch is an input to the CJB, which then drives the trunk latch (if the car isn’t locked, etc.)

Sep 29, 2025 | 11:55 AM

#22

David4883

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Joined: Jan 2024

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From: Near Nashville, TN

Quote:

Originally Posted by DJS

There’s some chance that will have damaged the central junction box. The switch is an input to the CJB, which then drives the trunk latch (if the car isn’t locked, etc.)

Prior to my mistake, I could push that button and the trunk would unlatch with the car locked.

Sep 29, 2025 | 12:31 PM

#23

DJS

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Joined: May 2013

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From: Metrowest Boston

Yes, if you had the key fob on you. Part of the keyless entry system.

Oct 8, 2025 | 02:44 PM

#24

David4883

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Joined: Jan 2024

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From: Near Nashville, TN

The F-Type lives again.
The thread on accessing the trunk latch power wire saved me.
Thanks to all for the help.

Oct 9, 2025 | 12:12 PM

#25

JagCode3

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Joined: Jun 2024

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From: SacTown

Good news indeed. Just to close this, what was the cause of the total power failure?

Oct 9, 2025 | 01:49 PM

#26

David4883

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Joined: Jan 2024

Posts: 70

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From: Near Nashville, TN

Quote:

Originally Posted by JagCode3

Good news indeed. Just to close this, what was the cause of the total power failure?

Me. I was the cause.
I did not know that the two red wires attached to the top of the cradle/bracket that the secondary battery was in needed to be connected together to power the car.
Once I put everything back, the car powered up. You could hear the chime for the door being open and various other things enjoying the return of power.