BE–107 BODY ELECTRICAL SYSTEM – AUDIO SYSTEM 26 | Amplifier | NO POWER COMING IN Is + B applied to power amplifier? No → Power amplifier faulty. Yes Is ACC applied to power amplifier? No → Power amplifier. Yes Is there continuity in wire harness? (Radio receiver to power amplifier) No → Wire harness faulty. Yes Check if GND to body is OK. No → GND faulty. Yes Radio receiver assembly faulty. 27 | Amplifier | POWER COMING IN, BUT POWER AMPLIFIER NOT OPERATING Is power amplifier operating normally? No → Power amplifier faulty. Yes Is there continuity in speaker wire harness? No → Speaker wire harness faulty. Yes Temporarily install another speaker. Functions OK? Yes → Speaker faulty. No Power amplifier faulty. 28 | Amplifier | EITHER SPEAKER DOES NOT WORK Is power amplifier operating normally? Yes → Radio receiver assembly faulty. No Is hiss produced by non–functioning speaker? Yes → Radio receiver assembly faulty. No Is there continuity in speaker wire harness? No → Speaker wire harness faulty. Yes Temporarily install another speaker. Functions OK? Yes → Speaker faulty. No Power amplifier faulty.