BE–99 BODY ELECTRICAL SYSTEM – AUDIO SYSTEM 13 Tape Player WOOFER SPEAKER DOES NOT WORK w/ Power Amplifier Check if RAD No. 2 fuse is OK? No → Replace fuse. Yes Is radio 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.