Power in the Radio???

[racso9018]

so I had a Sony Xplod radio. CDX-CA650X
well a while back i lsot the harness so i just kept the radio in the garage. but i think i got alot of moisture in it... so i was looking on ebay to buy another harness but before i do so i wanted to know if it still works... How can i test the radio itself without a harness to see if it still works?

thnx for anyone who can help me.

[PaulD]

you will need to be able to get into the plug and connect up switched power, constant power, ground and the speakers.