Home >> Jaguar >> 2012 >> XJ Base >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Audio Amplifier Module (AAM) -- XJ/X351 >> Diagnostic Trouble Code (DTC) Index DTC: Audio Amplifier Module (AAM) >> Description And Operation >> Audio Amplifier Module (AAM) >> B1A04-13: Speaker #4 - Circuit open >> Possible Causes