Just bought 1990 coupe deville. Radio does not work. Could it be a relay?

 

im new to this sight.
bought a 1990 deville sedan this week.....the radio is cooky in it too.....did u see the ghost electrical stuff? we r combing our electric system tomorrow....cheking all connections grounds and everything! something drains the battery if it sits 2 days without driving.
hoping its the radio..........i hope this helps