Blue/white goes to a relay for the 12 volts and to the lamps (white wires on the lamps).
Red is from the switch on the light housing to one of the solenoid terminals on the relay.
Brown is the other end of the switch and goes to the accessories fuse (10 amp. I believe) via the accessory lighting connector.
One black goes from the accessory connector (ground) to the other solenoid terminal on the relay.
The other black goes to the lamp housings (ground).
Blacks are tied together.
All of this was in a wire harness that came with the lightbar kit...and is still part of the America

There should also be a 12 volt (always hot) wire from the accessory connector to the relay. When the relay is energized, the bluw/white wire gets the juice.
hope this helps.