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In my experience most of these trucks wiring harnesses DO come prewired for trailer brakes but you still need to buy the kit that allows electrical trailer brakes to operate. This will include a switch box in the cab and hook ups at the rear of the truck that go to the trailer. Because of the many options that trucks can come with its just economical to include this extra wiring in the harness in case a factory type of brake system is added in the future and it also allows the factory to minimize the number of different kinds of harnesses they carry in stock.
A wiring diagram for the brake system should be looked at to determine which color wire controls this function both at the rear and under the dash. I'll leave it to someone more experienced than I to elaborate on this but considering the possible severe consequences of getting it wrong I would recommend taking this to a reputable service department and having it done right the first time.
Good luck !!!
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∙ 16y ago
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go to following link you will get the answer: http://www.wonderhowto.com/how-to-replace-brakes-2003-f150/
Ford F150 Brakes?
form_title= Ford F150 Brakes form_header= Drive safely with new brakes. When was the last time your brakes have been replaced?*= _ [50] Have you noticed any issues?*= () Yes () No Do you have to press hard on the brakes?*= () Yes () No
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