The brown wire is usually for the tail lights, or park lights.
red - brown black - blue green/yellow - green
If you are referring to a 4-wire flat trailer cord then; White=Ground, Brown=Marker/Tail, Yellow=Left turn, Green=Right turn.If not, see the answer to the Related Question shown below.
yellow left turn,green right turn,brown tail lights,white ground on standard 4 wire system brake lights will work off turn signals.
Vehicle side, Brown, running lights Yellow, left signal/brake light Green, right signal/brake light Black, ground Trailer side, white is ground
Red =Brakes or not used Green/yellow right turn Yellow/brown left turn Black= hot White= ground
The 1993 BMW 325 radio wiring colors are red, brown, green, yellow, and white. The red wire is the positive wire. The brown wire is the ground wire. The green and yellow wires are the speaker wires. The white wire is the auxiliary wire.
The best place is to take off the rear taillights and wire into them with splitters.
You have a grounding problem at the trailer. The white wire is the ground on trailer wiring. The taillights are brown, the signals and stops are yellow and green. Sometimes the white wire will loose its continuity with the truck, causing the lights to black out. It could also be a wiring issue with the trailer itself, but most likely its the ground giving you feedback and causing the blackout. run a wire from the ground contact on your plug back to a spot on the tongue and secure the end of the wire to the trailer at that point. Do not rely on the contact of the trailer with the ball hitch to establish a ground.
Left is yellow, right is green, tail lights are brown.
The brown wire is live (Mr Brown is a live wire!)Blue is the neutral wire for the return current. Green/yellow is the earth wire.
red + blue = purple blue + yellow = green red +yellow = orange orange +blue = brown yellow + purple = brown red + green = brown
: Wires colors: : Blue/yellow, red/white, yellow (silver dots), yellow/green, red/yellow, blue/red, green/orange, black (silver dots), white/green, brown/white, green (silver dots), white/red, red/black : primary color/stripes