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Old 05-23-2014, 11:49 AM   #1
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Brake conversion

I have replaced my axels with hydraulic brakes to axels with electric brakes. The question is the wiring. I am running 12/2 wire to the connector and am puzzled as how to wire them up since there are wires on the connector that seem to go to the old hydraulic system. Can I use them?
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Old 05-23-2014, 12:25 PM   #2
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Originally Posted by 5ndime View Post
I have replaced my axels with hydraulic brakes to axels with electric brakes. The question is the wiring. I am running 12/2 wire to the connector and am puzzled as how to wire them up since there are wires on the connector that seem to go to the old hydraulic system. Can I use them?
In short, yes. Should be a blue wire in the connector that is the brake wire, and your electric brakes should be wired to that blue wire, and ground coming from the tow vehicle.
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Old 05-28-2014, 09:37 AM   #3
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Smile Hydraulic to electric brakes

Quote:
Originally Posted by 5ndime View Post
I have replaced my axels with hydraulic brakes to axels with electric brakes. The question is the wiring. I am running 12/2 wire to the connector and am puzzled as how to wire them up since there are wires on the connector that seem to go to the old hydraulic system. Can I use them?
Someone here must have made this conversion. Please help me out. I hate to get this wire wrong, we are going to make a 400 mile trip to the far north shore of Lake Superior and there are some quite steep and bent roads.
Andy?
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Old 05-28-2014, 09:54 AM   #4
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Wait, 12/2? Like house wire? You should be using regular 12 volt wire.

The wiring is fairly straightforward - from the 7 pin connector to all four brakes. Just disconnect the hydraulic pump entirely.
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Old 05-28-2014, 05:39 PM   #5
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Stranded wire should be used. Solid wire is not flexible enough for the job and could fail from flexing. If you want brakes and brake operation when towing the lake Superior area use wiring that will ensure you will have brakes.

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Old 05-28-2014, 09:38 PM   #6
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I think that solid core wire would be ok so long as stranded wire is used for the last bit from the frame to the wheels, all the rest of the wire is stationary.

I don't know, Romex is a pretty good idea to go from the plug to the axles.
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Old 05-29-2014, 05:31 AM   #7
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Wait, 12/2? Like house wire? You should be using regular 12 volt wire.

The wiring is fairly straightforward - from the 7 pin connector to all four brakes. Just disconnect the hydraulic pump entirely.

My no! I'm not using romax. It's 12/2 automotive type wire(stranded) with a grey jacket. My question was. There are two wires coming from the plug which are terminated with a trailer type two pin plug. I think but am not sure they went to the hydraulic brakes. One white one yellow. The white one is ground the yellow (brake?). The wires coming from the seven wires coming from the trailer plug are not colored the standard way. I guess one way to be sure is to connect to my truck and see if they work, and don't energize something else.
One other thing all of the seem to ground like a short when not connected to the tow vehicle, but work fine when it is. This is by using an ohm meter on ground to the body. Is this happening because it is not connected? Can it short to this extend and still work without frying everything?
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Old 05-29-2014, 05:33 AM   #8
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I need to add the yellow wire seems to go up into the trailer some where also then to the connection, and I can't tell where.
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Old 05-30-2014, 12:45 PM   #9
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Brake conversion

I tell you what I might do.

I would seriously consider running new wires under the trailer. This might be the most simple and most trouble free route.

What it amounts to is you need a reliable hot wire and a reliable ground to each wheel.
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Old 05-31-2014, 11:07 AM   #10
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Exactly what I have done. Thanks.
Would anybody be intrested in the disc brakes and hubs/ rotors? Need pads and clean up but look to be virtually unused.
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Old 05-31-2014, 11:23 AM   #11
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I tell you what I might do.

I would seriously consider running new wires under the trailer. This might be the most simple and most trouble free route.

What it amounts to is you need a reliable hot wire and a reliable ground to each wheel.
The yellow wire is for the brakes.

The blue wire is the charge line.

Andy
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