hi new here so any help would be great,have a 51 (02) stilo JTD dynamic 115 hp ,originally had the connect/nav unit but previous owners removed now there's a box standard CD unit ,garage i bought it off couldn't get it to work,unit works though tested in wifes car,when connected ,powers up ,radio shows stations and CD player shows tracks but no sound ,checked all fuses even ones on the large speaker in boot ,all ok,any help would be great many thanks

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