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Old 12-13-2013, 07:22 PM
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LARGEONE LARGEONE is offline
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Join Date: Jun 2007
Location: Broomfield, CO
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This is the type of solenoid I used with my dual bat system. As Dave mentioned, I use the signal from the fuse box under the hood that is labeled ALT...so that the solenoid only connects the two batteries when the alternator has a signal. This way, the two batteries are completely separate when the vehicle is off. If I want them connected, I use a marine switch to tie the two together...in case I need to jumpstart myself.
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