If you don't see the wires with the others, it's possible the truck never had the option
applied. You would need to run additional wiring for the remaining connections. On models
that have the 4-pole, the brake controller output circuit will NOT be ran all the way to the
rear of the vehicle. It should be under the hood behind the drivers side wheel well. If you
need a 12-volt accessory lead (Trailer Battery), you will need to run a wire from the
positive battery terminal to the rear also. Hope this helps.
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