I snagged a premium sound Ford am/fm cassette for my 90 today at the bone yard. How do I bench test the radio to see if it works before I install it in the car? I haven't picked up the car yet, so I want to make sure this one works. It should be a plug n' play since that's the type this car uses. I just want something temporary to listen to some tunes; plus, I use the cassette deck for the adapter to my mp3 player. I want to test the unit at home first to make sure it works.