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azbohunter

arizona

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Posted: 05/25/21 11:50am Link  |  Quote  |  Print  |  Notify Moderator

Mike134 wrote:

no chance it's in one of the wheels. Only thing that could happen inside a wheel is the magnet goes bad either open (only that wheel wouldn't have brakes), or it shorts out blowing the fuse in your truck that furnishes 12V to the brake controller.

Just a tip put some Vaseline into your new crimp wirenuts to weatherproof them before inserting the wires.

Thanks Mike, I do have heat shrink connectors and I have dielectic grease. I will do as you suggest.
A couple years ago I had a similar brake issue with intermitant failure and it was a magnet had broken loose and the wire would short out but it never did blow a fuse but I would lose all brakes when it happened. I discovered it by pulling on all the wires looking for something lose and the wires on that wheel pulled right out of the backside when I pulled it. I wish this was that obvious.


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Krusty

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Posted: 05/25/21 12:38pm Link  |  Quote  |  Print  |  Notify Moderator

Absolutely it could be in one of the drums. I had that issue once on mine. A wire had rubbed thru right next to the magnet and would short to ground only when the brakes were applied and the magnet moved. It would of course affect all the brakes as it interrupted power to all of them and never blew a fuse.


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JRscooby

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Posted: 05/25/21 01:20pm Link  |  Quote  |  Print  |  Notify Moderator

IMHO, the best way to make a connection is with the right sized crimp connector, a good crimp tool. Fill the connector with blue Form-a-Gasket before you put the wires in, wipe off the excess.

azbohunter

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Posted: 05/25/21 02:12pm Link  |  Quote  |  Print  |  Notify Moderator

JRscooby wrote:

IMHO, the best way to make a connection is with the right sized crimp connector, a good crimp tool. Fill the connector with blue Form-a-Gasket before you put the wires in, wipe off the excess.


I have the proper heat shrink waterproof marine connectors, the proper stripping tool and the proper crimping tool, BUT this is a pain in the a-__ very difficult to get the crimping tool up to the back side of the hub and the wires going to the magnets are really short, probably easy in the factory when there were no tires, shocks etc in the way. I have all the connectors crimped but I still need to apply the heat gun to them.

azbohunter

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Posted: 05/25/21 02:48pm Link  |  Quote  |  Print  |  Notify Moderator

Things are going the wrong way. After wiring the brakes I pulled the breakaway and burned the wires off...so I'm thinking that one of those wire must be shorted to the frame in the belly... any one else feel that way?

JRscooby

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Posted: 05/25/21 02:51pm Link  |  Quote  |  Print  |  Notify Moderator

azbohunter wrote:

Things are going the wrong way. After wiring the brakes I pulled the breakaway and burned the wires off...so I'm thinking that one of those wire must be shorted to the frame in the belly... any one else feel that way?


Follow the burnt wires. At the end of the burn is where the short was.

Mike134

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Posted: 05/25/21 02:59pm Link  |  Quote  |  Print  |  Notify Moderator

azbohunter wrote:

Things are going the wrong way. After wiring the brakes I pulled the breakaway and burned the wires off...so I'm thinking that one of those wire must be shorted to the frame in the belly... any one else feel that way?


If I was called to troubleshoot:

Question #1 how did it work before you "fixed" it?
Question #2 show me what you did. That's typically the location it's failed.

I'm thinking you need a helper with a bit more wiring knowledge.


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azbohunter

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Posted: 05/25/21 04:23pm Link  |  Quote  |  Print  |  Notify Moderator

Mike, I appreciate your help and comments as I have waded through this. I have had the intermittant brake problem for a while. When I first dug into it I found the bare wires that were in photo in a ealier post. I cut the bare spots out and used proper connectors with heat shrink. The bare wires were and issue and I am glad I found it and fixed it. Today, I pulled wires out the axle, ran new wires and reconnected them, blue to one side of magnet and white to one side, I was told that it didn't matter which..there is not positive or negative.
My thought are that there is more bare wire inside the belly that I can see and from my tugging and moving them around they have grounded to the the frame. I could run new wire all the way from the plug and bypass the belly to or may even apply 12 volt at the wiring going into the first axle..
I am not a automotive wiring guy, but I have completed rewired a house and a boat with a lot of electronics so I am not totally inexperienced.
I am assuming that the breakway simply sends 12volts to the magnets?

Mike134

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Posted: 05/25/21 04:42pm Link  |  Quote  |  Print  |  Notify Moderator

azbohunter wrote:

Mike, I appreciate your help and comments as I have waded through this. I have had the intermittant brake problem for a while. When I first dug into it I found the bare wires that were in photo in a ealier post. I cut the bare spots out and used proper connectors with heat shrink. The bare wires were and issue and I am glad I found it and fixed it. Today, I pulled wires out the axle, ran new wires and reconnected them, blue to one side of magnet and white to one side, I was told that it didn't matter which..there is not positive or negative. Correct the magnets don't care one wire to the pos. side one wire to the neg. side.
My thought are that there is more bare wire inside the belly that I can see and from my tugging and moving them around they have grounded to the the frame.possible since they skinned those wires you repaired, they likely skinned others during the install I could run new wire all the way from the plug and bypass the belly to or may even apply 12 volt at the wiring going into the first axle..
I am not a automotive wiring guy, but I have completed rewired a house and a boat with a lot of electronics so I am not totally inexperienced.
I am assuming that the breakway simply sends 12volts to the magnets?correct
You said the wires burnt when you pulled the breakaway where did they melt?

azbohunter

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Posted: 05/25/21 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

Right at the breakaway.
I opened up the bottom enough to get at the wiring and I seen nothing alarming but after checking things out and moving stuff around I hooked up wires for breakaway and no smoke and brakes locked.
I think at this point it's new wires from front back.

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