Let me look up the other diagram, I thought the LT meant you had the limited edition, I need to make sure the circuits are the same.
Okay, the circuits are completely different from the Limited model, the diagrams 1 and 2 below is the basic circuit for the Lid latch release and Relay, the release is in the trunk lid, In the third diagram is the OEM diagram, the purple X is the circuit that powers the Lid latch actuator. If there is a plug very close to the actuator, you can unplug it, replace the fuse and try the button again, if the fuse blows, the short to ground is somewhere from the connector you unplugged to the relay, if it does not, the short is the other way down from the connector towards the actuator. There appears to be this X900 connector, so I'll find that, but the cover has to come down to get to the lid latch (diagrams 4 and 5). And there must also be wiring going from the trunk lid to the vehicle frame, it's an area where the wiring would have to flex when the trunk is opened, kind of the same as you see when you open your driver door, that rubber grommet that has all the wiring for the doors in it. I will locate the connector X900, but you can inspect the latch area in the trunk lid and see if anything stands out. Wiring that looks like the insulation is missing or the wire has been caught on something, contact points with the vehicle frame.
Diagrams 7 and 8 are the Lid Latch connector, it should be right at the latch, so you can disconnect that, leave the trunk open, replace the fuse and see if it still blows, that will help us rule out the Lid latch actuator as being shorted out or not.
I have also added the wiring harness routing in the Trunk Lid (diagram 9)
Here is also a place to check for a short to ground, this is from a verified fix. There were damaged wires found in the rear quarter panel and it looks like the wiring harness runs to the right from the latch, so I think they are referring to the rear quarter panel on the passenger side. It does say if they had to take the wheel well out, of it they got to it from inside the trunk on the passenger side. But do the fuse test with the Latch release unplugged first so you know it's not the release actuator shorted out.
https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-check-a-car-fuse
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Saturday, September 3rd, 2022 AT 1:46 PM