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Check the voltage at your alternator output terminal with a multimeter. You may have lost a diode in your alternator, which will give you low voltage. Your dashboard voltmeter may not show the problem.
Check the voltage at your alternator output terminal with a multimeter. You may have lost a diode in your alternator, which will give you low voltage. Your dashboard voltmeter may not show the problem.
It could also be a bad ground. If you had a single amp, I would say start there. The bose has an a amp at each speaker ( which you probably know). The older bose systems are a little temperamental.