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Old 10-12-2010, 06:20 AM
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7 Way 12v Aux.

I probably should post this in the Towing section, but I'll try here first.

I read so many people call the 12V aux lead on the 7 way a "battery charging" lead. Is this what is was designed for? Does it have current limiting capabilities? The diagrams I've found just show a keyed/fused 12v supply to the trailer receptacle. Does anyone use it for charger their camper batteries and have you had any issues with fuse blowing? I'm figuring a dead battery can draw some pretty good current, not to mention any load that is attached.. Any info would be great.
Thanx...
Marshall
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Old 10-12-2010, 06:30 AM
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The 12 volt aux lead is designed to provide auxiliary power to your trailer. Mainly for 12v lights inside an enclosed trailer.

But depending how the trailer is wired yes it can be used to provide a trickle charge to a battery
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Old 10-12-2010, 06:39 AM
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So there's nothing to keep a trailer battery from drawing a lot of current other than the fuse? A dead or low battery can draw some pretty good current. Way more then a trickle.
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Old 11-20-2010, 12:42 PM
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i know this is kinda old. anyway i used to have a 10' in bed Truck camper. one happy night of camping woke up at about 3 am to my LP detector going off. found out that it is also a low battery alarm. went to start on board generator and nothing. the next morning found that if i Start my truck, i could start the generator.
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Old 11-20-2010, 01:37 PM
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The 12V aux only runs if the key is on. So running or not, the key has to be in the on position. And make sure you have the appropriate fuses and relay for it.
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Old 11-21-2010, 05:29 PM
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anyone switched to a constant feed in stead of keyed? I hate that my key has to be on in order to see inside my trailer...
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Old 11-21-2010, 05:43 PM
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It's just a feature to save your batteries. Not hard to do. Just wire it from the batts and fuse it. Voila.
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Old 11-29-2010, 05:52 PM
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Quote:
Originally Posted by jesilvas View Post
The 12V aux only runs if the key is on. So running or not, the key has to be in the on position. And make sure you have the appropriate fuses and relay for it.
anyone know what wire this is? i could figure it out just curious if anyone knows off the top of their head.
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Old 11-29-2010, 05:59 PM
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Center pin on the 7way. Commonly orange.
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