Posted by John in la on August 28, 2012 at 17:12:15 from (68.222.52.35):
In Reply to: Trailer brakes update! posted by JohnDeereJimOhio on August 28, 2012 at 15:06:34:
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.
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