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That's Nissan's Lighted Sill add-on. Looks like it shorted right where the wire enters the sill. Water probably worked its way in thru the wire opening, creating corrosion where the wire meets the board, which eventually shorted out.

If you need to replace the one sill, take a look in the "For Sale" section. I'm selling a slightly used set for less than 1/4 of Nissan's price.

The lighted sill draws power thru the dome fuse, so if you still have a dome light, then the issue is strictly at the lighted sill. I would suggest pulling the inner plastic sill cover and kick panel to follow the wire and unplug it until you decide what to do with it. It should have a disconnect right under the inner plastic sill cover.

Good luck.

Have a good day.
 
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Follow the wire that's wire tied. It should have a connector. I would unclip it to avoid any further electrical issues until you decide what you want to do.

To remove the sill, heat it up with a heat gun or hair drier and use a plastic body trim removal tool to pop it up. It's fastened with two weak clips and double-sided tape. The heat will loosen the tape. It will take a while for the heat to get to the tape.

Good luck.

Have a good day
 

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Perhaps a loose wire harness is caught and being tugged on or moved around everytime that courtesy move happens, and has exposed a bare wire. Or, perhaps you have a mouse living beneath the very roomy area between the carpeting and metal floorboards, and it's been chiewing on the wiring.
The wire is nowhere near anything moving. The wire he shows is wire-tied to the main wiring harness going to the rear of the car, which is located under the plastic door sill.

Still looks like a failure where the wire is soldered to the internal board. Started to overheat from corrosive resistance, melting the plastic until it burned thru. Probably why it didn't blow the fuse and he still has a functional doom light.

Have a good day.
 

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I still wonder about that raised area of rubber.
That's where the wire goes under the door seal. They've flattened the wire at that point and reinforced it where it goes over the metal lip that the door seal goes over.

The melted area on the sill is where the wire joins the board that the LEDs are laid on.

Pretty sure it's a corrosion issue. The wire going in is not sealed and over time, moisture probably worked its way in over time. Also, outside electrical addons are rarely waterproofed properly, like dip sealing the board and all the connections.

Have a good day.
 

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Hello, everyone this just happened to me as well.. on the passenger side. Anyone have an idea how much it would cost to fix?
Yea, you have to buy the complete set. Nissan doesn't sell them separately. If you have an extended warranty, you might want to see if the dealer will bear the cost of a set to replace the one piece.

I'm selling a slightly used set of Nissan's lighted sills, here on the forum in the classified section if you're interested.

Have a good day.
 
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