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Q:

DEAD POWER on 2006 Hyundai Tiburon

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I was driving down to work and my Stereo, Spedometer lights, signals and power windows went dead. During luch i was going to take it to Autozone but as soon as i started my car everything worked again. Everything was good throughout the day until night time when driving home same things went dead again, checked my fuses, seem to be good.
(1) Answer
A possible charging system problem. If the alternator fails to maintain the correct charging rate the BCM could disable consumers to conserve energy so the engine could run.
Take it to a repair shop and ask for a charging system test, ask them to do it after a few miles of test drive while the consumers are on, i.e. radio, lights, A/C..

Zee