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Old 09-12-2018, 06:28 PM   #1
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7-pin and 12v source

Hi, does anyone know if the 7-pin connector at the rear of the coach can be used to tap into a constant 12v power source?

Reason I ask: I'm setting up my toad and have a brake system that requires constant 12v power. Rather than plug into the cigarette lighter type source, I want to power it from the coach so it doesn't deplete the toad battery in transit.

If you are using a successful solution to this, can you go into a little detail?

Thanks.
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Old 09-12-2018, 06:39 PM   #2
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Most of those 7 wires are small gauge to operate not much more than a couple of lights...do you know what amperage the braking system requires? The center pin is reserved for reverse lights, if needed. That one may work depending on amp draw, etc.
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Old 09-12-2018, 06:52 PM   #3
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It's pretty easy to start popping fuses, when you overload those circuits.

Don't ask me how I know this...
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Old 09-12-2018, 08:02 PM   #4
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I don't and unfortunately I'm not near the rig right now. Both really good thoughts though. I didn't look at it that way and should have. That wouldn't have happened when wearing a younger man's clothes.

I'll just run a separate wire with an inline fuse and try to bundle it together with the others in one neat little run.

Thanks for the feedback/input, as always.
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Old 09-12-2018, 08:05 PM   #5
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The 7-pin should have a charge wire but I doubt its fused for more than 10amps or so. Here is a bunch of wiring diagrams, pick one LOL (yeah ok just look at the vehicle side 7-way one):
https://www.etrailer.com/faq-wiring.aspx
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Old 09-12-2018, 09:00 PM   #6
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Quote:
Originally Posted by JamieGeek View Post
The 7-pin should have a charge wire but I doubt its fused for more than 10amps or so. Here is a bunch of wiring diagrams, pick one LOL (yeah ok just look at the vehicle side 7-way one):
https://www.etrailer.com/faq-wiring.aspx

Update: it's right in the 'Trailer Wiring Code' section as: "Battery Red (or Black) 12 Fuse block or FUSED battery Lead Break away kit, interior lights and battery charger "


You're a wealth of knowledge - huh?
Looks like it can be used for electric brakes. I imagine () that could throw more than 10 amps when engaged. I also see where they have an Aux/ABS Power pin. Also a good sign. I have some homework to do and they're really good at answering questions.

Thanks for the tip (and link).
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Old 09-12-2018, 09:10 PM   #7
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Quote:
Originally Posted by RvEd View Post
Update: it's right in the 'Trailer Wiring Code' section as: "Battery Red (or Black) 12 Fuse block or FUSED battery Lead Break away kit, interior lights and battery charger "


You're a wealth of knowledge - huh?
Looks like it can be used for electric brakes. I imagine () that could throw more than 10 amps when engaged. I also see where they have an Aux/ABS Power pin. Also a good sign. I have some homework to do and they're really good at answering questions.

Thanks for the tip (and link).
No, the "Electric Brakes" is a different wire than the constant 12 VDC Charging Wire.

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Old 09-12-2018, 10:56 PM   #8
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When I wired up my stay and play braking system I went ahead and hooked it to the battery and then I went ahead and added a charge wire to keep the battery charged my 2014 freedom elite 7 Pin plug does have a charge line to it
one thing that itís only hot when the RV engine is running main reason I did this for time reasons if you do have a breakaway youíre breaking up system will still use it but toad battery to stop your toad
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Old 09-13-2018, 01:22 PM   #9
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Quote:
Originally Posted by Tfryman View Post
No, the "Electric Brakes" is a different wire than the constant 12 VDC Charging Wire.
Thanks. I see that. What you said...
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Old 09-13-2018, 01:46 PM   #10
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Sorry, trying to get my head wrapped around this.

The coach has a built-in charge wire or just a 12v source? I'm wondering where the regulator is located and how the battery is kept from overcharging. As far as I know, the regulator is located in the alternator and not in an external location to be 'incorporated'.
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