Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> AEM, CEM & Rem Diagnostic Trouble Codes - 9 Of 12 >> CEM-8FA3: Relay, Signal Horn. No Signal. Permanent Fault (1999-2004) >> Diagnostic trouble code information