Trailer brakes update!

I read thought the posts last night and I can understand why some of u said too require the whole trailer. However the trailer is like brand new we have owned it 5 years but it"s always stored inside never used in winter and is in great shape.. I traced all the wiring and no signs of any shorts anywhere, except on the back right axel where the white wire goes in it is rubbed through.. I"m going to replace this. Would that be my culprit? It"s now way that was caused from my Mishap with the plug, I wouldn"t think anyways. I took some pics of the plug and wires and I"ll upload them when I get home.. I also only found one spot it was grounded on the trailer it is up on the neck.. I"m going to clean it up really good and see how we make out.. Also it is a 6 slot plug with a center pole.. And nothing is conected to the center pole on truck or trailer side..

Center post is for battery voltage to supply electricity to camper.Supplies and charges camper battery thru that post.

If the white wire is the hot one to that brake you might have found the fuse blowing problem. These type of problems can be so darned elusive. One little tiny stray wire strand can be touching ground back behind something where you can't find it.

I was about driven to drink trying to find an intermittent fuse blowing problem on a 53' combine trailer in Idaho. It might go a week without blowing the fuse, one of those!! One of the crew wanted to load a combine on it and I wouldn't let him until I found the problem. The trailer was going to be crossing a scale 30 miles up the road in Wyoming and the problem HAD to be found before the trailer left. Checked EVERY inch of EVERY wire and it all looked good. Combine driver was sitting in the combine, stopped right at the bottom of the ramps with the engine running. Finally, in the back of the trailer, back behind the license plate, someone at sometime had cut a wire and just let it hang. Eventually the wire jiggled straight down so the bare end was occasionally rubbing the frame. By the time I found it you could cut the tension between the combine driver and me with a knife. I could go on and on! Jim

(quoted from post at 20:29:33 08/28/12) Center post is for battery voltage to supply electricity to camper.Supplies and charges camper battery thru that post.

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Nope, see my post in the other thread.

I did not see your last post so I went back and read some of it. The thing that caught my eye was you said white wire that goes to my brakes. The white wire is suppose to be ground so you may be feeding brake power straight to ground blowing the fuse.
I really think you need to start over and make sure you have the plug wired correctly. The center plug is for battery power such as to power a inside light on a box trailer; to charge a on board battery; or run some other item that has nothing to do with the lights or brakes.

The electric brakes on a trailer work this way. The blue wire feeds power to the brake magnets inside the drum. This power is adjusted by your brake control unit in the truck. The other wire on the magnet is the ground side (usually the white wire) and rather than run a wire for this they use the trailer frame. So one wire from the magnet should be hooked to ground by the axle; and the ground wire from your wire plug should be hooked to ground at the neck of the trailer.

Study the pictures and find out if you have it wired correctly. If so you most likely have a wire that was pulled and is touching ground.

If the bare wire was close to the brakes, within 6-8 inches, and between the splice to the wire coming back from the front and the brake, it would be white or black depending on which magnet he has. Both wires from the magnet are the same color and it makes no difference which is hooked to the blue and which goes to ground. Just like a 12v light bulb, power on one side groung the other and it works no matter which side is hot.

hillbillyjack
Trouble is you are quoting 7 pin in your post of the other thread. He has a 6 pin plug.

(quoted from post at 21:31:27 08/28/12) hillbillyjack
Trouble is you are quoting 7 pin in your post of the other thread. He has a 6 pin plug.

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JohnDeereJimOhio said:

" Also it is a 6 slot plug with a center pole.. And nothing is conected to the center pole on truck or trailer side".....

Sounds like a 7 pin plug to me.

There are two "standard" ways to wire a 6-way plug, one is the way in the pictures above, or the other way is to switch the power to the outer pin and the brake power to the center pin.

But you are describing a 7-way RV plug.
7 way wiring

hillbillyjack
Now that I read it the way you say it I agree.
It does sound like he has a 7 pin plug.

John in La,

It's pretty easy to miss something the first time you read it, I find myself rereading most times before I reply, still mess up by times.

6 slots and a center pole is a 7 pin RV connector- and the center pole usually won't have anything, because its for back-up lights, which few trailers have.