Need to post pic of factory wiring diagram.

Generally:
Red is Switch 12V+ eg ON when you turn Key to ACC or ON, and OFF when you turn the key OFF or take out of ignition. It usually has a Fuse attached that is like 5 or 10A.
Yellow is usually the Memory wire ie, you connect it to Always ON 12V+. It draws bugger all power but keeps you stations in memory etc when you take out you keys from ignition. It can Have a fuse but wuold be like 0.5 or 1A. It will not drain you battery overnight.