electrical question
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Joined: Sep 2008
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on trucks that i had seen the second battery was separate from the main battery. the second battery supplied power to the accessories like lights, radio, wipers etc. and the first battery only ran the starter. this way if you left your lights on and drained the second battery you could still start with the first battery.
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Joined: Jul 2002
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From: Long Island USA
on trucks that i had seen the second battery was separate from the main battery. the second battery supplied power to the accessories like lights, radio, wipers etc. and the first battery only ran the starter. this way if you left your lights on and drained the second battery you could still start with the first battery.
