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Under the pan on the drivers side u can install the proper harnes for your trailer. The maim post for trailer brakes is on the front fuse panel under the hood.If you are running your own in line trailer lights...........I would start at the main break away dis-connect.
Did yo check the fuse panel inside the truck its located on the drivers side dash , you have to open the driver side door, in there is a 10 amp fuse that is linked to rt trailer brakes and rt turn signal for the trailer, if the fuse is good there is a black box under the dash located on the floor on the driver side, just to the left of the break, thats where must of the plug in wire harness is for the trailer breaks!
Hi: under the hood in the power distribution box there is a 40 Amp fuse that has to be installed to power up the trailer package. When standing looking from the front left fender it should be at the front right corner, refer to the power distribution diagram on the cover. As well under the box by the spare tire is a plug in type module mounted on the frame. There should be 2 wire harnesses located there, make sure the correct plug in is connected. Hope this helps... please rate suggestion .... ty
Check it with a test light. White-ground, Yellow-left turn, Green-right turn, Brown-tailights. Check it on the truck first. There are seperate fuses for just the trailer wiring in the fuse box under the hood. The Blue and Red wires are for Trailer brakes, don't worry about those.
Is this a 4 way or 6 way connection system? If your truck is wrong, then all factory equipped trailer package harnesses would be wrong, tell your trailer guy...I don't think so.
Is this the first trailer you have hauled?
Let me know, and we will go from there.
they are seperate fuses and also has trailer light relay for tow package models , look for trailer light relay fuse , with key on check them all while your there , if fuse is good , swap with another relay , if that will not work , check bulb housing for melted terminals , lastly have body control module ckecked