Trailer Brake Controller Problem

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Apr 12, 2009 | 07:59 PM

kpriddy

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Joined: Dec 2006

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Trailer Brake Controller Problem

I am in need of help. I have a 1999 F-250 Superduty and cannot get my trailer brakes to work. The brake, turnsignals and lights all work. I have tested the main connection plug under the rear of the truck and when I hit the controller, I do not get a signal from the controller. I also cannot get a constant 12 V with the key in the "on" position. Any suggestions on where to start troubleshooting? I checked the large fuse under the hood and it isn't blown so I can't figure out why I can't get a signal at the plug. It has worked in the past and the controller is plugged in directly under the dash to the factory supplied plug. Thanks

Apr 12, 2009 | 09:32 PM

Franklin2

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Joined: Jan 2001

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From: Virginia

Check the signals at the brake controller. You have a hot wire(I think that is red) a good ground(white?) and a blue which is the output to the rear brakes. There is another wire which I cannot remember the color, that is the brake signal going into the controller. It should have 12v when you hit the brake pedal.