No sound right side speakers on 1994 Mercedes-Benz SL500

Have Bose system with amp. No sound right speakers sound might finally come on after awhile. How can I tell if its the radio or the amp

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2 answers
BAD RADIO AMP.
MOST LIKELY A BROKEN WIRE OR BLOWN SPEAKER BUT IF SPEAKER COMES ON SOMETIMES IT IS A BAD CONECTION OR A AMPLIFIRE PROBLEM NEED TO RUN TEST ON SPEAKER LEADS GARY FROM BETHESDA AUTOMOTIVE SERVICES