7 Pin adapter to 'fridge - Ford Powerstroke Diesel Forum
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Old 03-14-2012, 09:43 AM
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7 Pin adapter to 'fridge

Hey strokers, general type question here.

Basically I live out of my truck for biological work, and I take the truck that a trailer would NEVER go. So my current idea is putting a specialized refrigeration unit in the bed of the truck. The issue is that I am needing to put a marine battery (vented of course) in the bed. I had the crazy idea of just running an adaptor from the 7 pin trailer hookup, to the marine battery to charge it any time the truck is running. Do you guys think that this is a viable option to charge the battery? the truck is driven quite a bit, and the units are quite efficent. Is this a one way setup, meaning that I can leave it plugged in the 7 pin and it will not drain the starting batteries? I do not see any issues with it, but I have never really used the 7 pin for anything, so you all know more than I know.
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Old 03-14-2012, 09:46 AM
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It shouldn't drain the truck's batteries. The power pin on the 7-pin plug is on a relay, I believe, so when the truck is off, no power goes to the pin. You can verify that with a volt meter.
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Old 03-14-2012, 10:02 AM
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Thanks I figured so. Everyone I work with is running solar panels on their toyotas, but Im thinking with the SD I wont have to!
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Old 03-14-2012, 10:24 AM
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That will work fine!
It will charge the battery whenever your truck is running and will not drain any juice out of your truck batteries when the truck is not running. That is exactly the same way it charges trailer batteries if you tow a trailer.
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