Look at the fuse panel to find out how it is fused. If unsure of which fuse pull one until the awning doesn't light.
To go multi color would require running wire from controller all the way to the awning. It is inside the wall/ceiling and not easy to get to. You could run it under the trailer then up to the awning. I won't be doing that.
The original strip works for me, but dimming was desired. I installed a remote with dimmer. The remote I have works fine inside the cabinet under the sink (mine is a 29HFS).
It was easy to find the wire to the awning light... it was brown/white I think... tap in to ground and hot (at the switches) to power the remote then break the one hot to the awning light through the remote. Leave grounds alone.
I also added warm white LED strip above the slide with remote.
Wireless Home LED Lamp Light Dimmer Remote Controller Durable Switch Useful 12V | eBay