I bought this wiper motor that looks old at a flea market a few weeks ago. It was only $5.00 bucks so I took a chance. Just got around to testing it, first I used a lap top power supply that I got for 50 cents at a garage sale. It didn't work so I directly connected to the battery of my car, nothing again. It looks pretty simple, it has a black and red wires which i assume are positive and negative. Anyone care to officially pronouce it dead before I pitch it?