It looks like it feeds the actual gauges, yes. Courtesy also feeds instrument cluster and there is a dimmer fuse as well. Also, the gauge lights are in parallel so one can be incorrect and the others would still work. Does the headlight switch light up or did you do an led there as well? It looks like the dimmer fuse feeds the lights, so I would start there. I believe it will be a gray wire coming from the fuse and going to the gauges. Check for power at the dimmer connector. If only one side has power with lights on, switch issue. No power, fuse/feed issue. Power to the cluster, cluster/ground issue. Let me know if you need further explanation or clean this gibberish up
Figure this might be up your alley
http://ls1tech.com/forums/appearance...mats-ever.html
Who knows if they are legit or just **** though.