Standard Color Code for Wiring Simple 4 Wire Trailer Lighting
Question:
I have had to mess with trailer wiring for years, once or twice a year anyway, and I just cannot keep the color code right, ect white/ground, brn/ running lights, grn/ right turn, yellow left turn? Please help me get it right. thanks
asked by: Gary R
Expert Reply:
You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal.
The colors for wiring a 7-way connector are as follows with the 4 colors of the 4-way connector remaining the same.
White-Ground
Brown-Tail/Running Lights
Green-Right Turn/Brake - Remember green has an R in it
Yellow-Left Turn/Brake - Remember yellow has an L in it
Blue-Brake Controller Output
Purple-Auxiliary 12v Power/Reverse Lights/Reverse Lockout For Trailer Brakes
Black 12v Battery Power
I have posted a link to our FAQ wiring page for more detailed clarification.
Steve
7/25/2020
I have two amber and two red side marker lights for a boat trailer. This is an older 1999 trailer. The existing lights had one wire connected and it’s the brown wire (4-pin) 5 wire. The replacement lights have two wires red and black. I currently only have the brown wire exposed. How do I wire brown wire to this light.
Chris R.
7/30/2020
Y
5/24/2020
I don’t have a white wire coming out of my Chevy 2006 pick up. Red black and blue are the three big wires then ther are five other I want to hook up a flat 4 prong hook up to my trailer which wires do I use my trailer connecter has four colors green Brown white and yellow what goes where!!!!
Chris R.
5/27/2020
Dennis
4/14/2020
I have a separate wire for brake lights. How does that connect into a 4 pin connector?Thanks for any help
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