New axle quick question about the brakes - Fiberglass RV


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Old 05-08-2014, 01:40 PM   #1
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New axle quick question about the brakes

Time to finally finish up the wiring. Got my correct axle finally. So I noticed there are 2 wires for the brakes its not marked which is positive and which is negative. So I assume I just pick one to be positive and run it up to my 7 pin plug? Also Ground should I run it to my trailer frame or up to the plug as well? I'm thinking the plug as well.
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Old 05-08-2014, 01:50 PM   #2
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My ground is connected to the frame on both sides and also tied together so should 1 ground go bad, it will get it from the other side.

The hot wires come together under the camper and one wire goes up to the connector.
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Old 05-08-2014, 02:14 PM   #3
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The wire you run from you plug to the brakes is typically blue. I would go #12. That is over kill, but hey, it's your brakes. The other wire is ground. I never use the trailer frame for ground, (though it is connected to ground). I always run a separate white wire for that, tied to the trailer frame. Right back to the trailer plug.

Here is what E Trailer has to say about wiring.
http://www.etrailer.com/faq-wiring.aspx
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Old 05-08-2014, 02:26 PM   #4
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Originally Posted by David Tilston View Post
The wire you run from you plug to the brakes is typically blue. I would go #12. That is over kill, but hey, it's your brakes. The other wire is ground. I never use the trailer frame for ground, (though it is connected to ground). I always run a separate white wire for that, tied to the trailer frame. Right back to the trailer plug.

Here is what E Trailer has to say about wiring.
Trailer Wiring Diagrams | etrailer.com
Everything David says here is the way I do it too. Grounds are critical, things don't work well (or work at all) if you scrimp on the ground.

Frank
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Old 05-08-2014, 02:31 PM   #5
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Did you have or plan to install a breakaway switch? this must be installed in the positive line used on the brake coil.
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Old 05-08-2014, 02:43 PM   #6
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I am using 10 gauge for all wiring.
I did not think of a breakaway switch. Hmm wonder if checkers has any.
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Old 05-08-2014, 02:47 PM   #7
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I am using 10 gauge for all wiring.
I did not think of a breakaway switch. Hmm wonder if checkers has any.
I wouldn't doubt Checkers has them, but might have to order one in.

Breakaway Kit Installation for Single and Dual Brake Axle Trailers | etrailer.com
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Old 05-09-2014, 08:49 PM   #8
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If you are going to do the work, buy one that won't drag on the ground or require zip ties. Do it right the first time! 4' Zip Breakaway Cable & Switch
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Old 05-09-2014, 09:52 PM   #9
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Originally Posted by aznative View Post
Time to finally finish up the wiring. Got my correct axle finally. So I noticed there are 2 wires for the brakes its not marked which is positive and which is negative. So I assume I just pick one to be positive and run it up to my 7 pin plug? Also Ground should I run it to my trailer frame or up to the plug as well? I'm thinking the plug as well.
According to the Dexter brake-equipped axle instructions at this E-trailer link, your presumption is correct: the magnets don't care which wire you choose to be hot/not.

My advice per ground would be to use the main trailer ground, and with the same gauge ground wire used in the rest of the rig.
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