So I re-installed the addon pack, and it did get rid of the weird texture, but it also got rid of the rotator lights entirely. The front red and blues along with the rear ambers under the main lights still work, but the rotators and front headlights no longer work. I also don't believe another pack is overwriting them, because this pack was working alongside other ones, and I haven't installed any additional packs since.
I have no idea what went wrong here. The rotators are freaking out, and I have no idea why. I haven't changed anything in the pack itself, as last I used this car, it was working. The only thing I did was remove a graphic mod, and I don't think that would have caused this. Suggestions on how to fix? I really love these rotators and want to use them again soon. Video: https://imgur.com/a/rotator-IIwaHMj