Blatant,
I have installed trailer harnesses in the past on other types of trucks and i had to get a heavy duty turn signal condenser. <img src="/forums/images/graemlins/confused.gif" alt="" />(not sure if that is what it is called but that's what I'm calling it for now) <img src="/forums/images/graemlins/confused.gif" alt="" /> You just remove the standard condenser and plug in the new one. YOu should be able to get one at any auto parts store.