Test Power to 95 Silverado Radio

Everything in the dash is working except no power to the radio or clock. The fuse panel checks out ok. I've got the radio out and want to test voltage to the unit. Does anyone know which pin is the power?

Thanks, JD

I don't know right off hand, but you can find out pretty quick with a test light. Just ground it and poke the probe in all the holes. The one(s) that light it up is/are power.