I’ve recently picked up an ‘05 Yukon Denali that had every optional interior accessory added in, but it’s in rough shape and needs a lot of work. One of the things I’m trying to work on but can’t find much about is the original illuminated door sills. I have them installed but they no longer light up, so I’m hoping someone has any info or tips on how to safely repair them, and general internet searching doesn’t turn up with many results for this on the gmt800s. Anything from general experience tips to wire schematics is appreciated.