Okay, I'll wing it here on basic color definitions, even if we're talking about a Lumina:
Pin 3- ORG: Battery voltage (always hot)
Pin 5- PPL/WHT: Traction Control Fault Indicator (i.e. the Traction Off light)
Pin 7- PNK/BLK (I am guessing a hot in run, start): Yes, ignition power
Pin 10-TAN/WHT: Brake Indicator. Grounded when parking brake is set.
Pin 11- BRN/WHT: Malfunction Indicator Lamp (i.e. the Check Engine light)
Pin 15- WHT: Antilock Indicator
Cluster connector C1; Row B:
Again I'm not sure exactly which connector (or even which car) you're referring to at this point, but anyway:
Pin 8- BLK/WHT (I BELIEVE this is the DIC ground): It'* most likely a ground, although the same color coding is used for (of all things) the Low Washer Fluid warning, too.
Pin 15- BLK (Another ground I think): Probably.