I've got a stock radio in my '93 worker Mule and it crapped out. Went to the junkyard and found lots of radios that look just like it, but the plugs on the back are wrong. Mine has one large plug like the others but also has a small square plug on a blue cable that goes to what I guess is an amp under the passenger seat. What other cars had this radio besides the 93 Mustang? I can't find one in any other Ford so far!