BE-92 BODY ELECTRICAL SYSTEM – AUDIO SYSTEM 5 Radio WOOFER SPEAKER DOES NOT WORK w/ Power Amplifier Check if RAD No. 2 fuse is OK? No Replace fuse. Yes Is tape player operating normally? Yes Radio receiver assembly faulty. No Check if GND to power amplifier is OK? No GND faulty. Yes Is +B applied to power amplifier? No +B wire harness faulty. Yes Is AMP applied to power amplifier? No Check the radio receiver assembly. Yes Is there continuity in wire harness? (Radio receiver to power amplifier) No Wire harness Faulty. Yes Temporarily install another woofer speaker. Functions OK? Yes Woofer speaker faulty. No Is there continuity in speaker wire harness? No Speaker wire harness faulty. Yes Temporarily install another power amplifier. Functions OK? No Radio receiver assembly faulty. Yes Power amplifier faulty.