It's been over a year and a half since i did the install, so I'll kinda have to go from memory. The disconnect is one a friend had in his stash, but I think it can be had at any autoparts store. The three relays are standard bosch style relays, again found at any auto parts store. One is for the driving lights up front, one is for the rotating lights on the rack, and one is for the flood lights on the rack. The white wires run to the in cab switches that activate the relays. One for the rotating lights and the other for the flood lights..they are wired to the acc terminal in the fuse block so if the key is off so are the lights. The relay for the driving lights are triggered by the high-beam headlights. That master disconnect will isolate the radio and lights from the truck by pushing the red button on the disconnect. The other red cable is a standard Motorola power cable for the business band.