Installation of 7-Way Connector on 2004 Chevrolet Silverado With Factory Wiring

Updated 12/28/2012 | Published 12/27/2012

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Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End

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Hook Probe Circuit Tester

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Question:

1:00 is Black and 12 volt power 3:00 is Green and Right Turn and Brake 5:00 is Blue and Brake Controller 7:00 is White and Ground 9:00 is Yellow and Left Turn and Brake 11:00 is Brown and Tail and Running Lights Center is Purple and is Optional Reverse I have the black, green, blue,yellow and brown wires. i do not have the purple or white instead i have a greenish yellow wire and a red wire. i have no idea where they are suppose to go. i drive an 04 chevy silverado 1500.

asked by: Dylan

Expert Reply:

On your 2004 Chevrolet Silverado 1500 the factory wires should be light green, dark green, blue, yellow, red, brown, and black. The functions of those wires should be as follows:

light green - reverse lights
dark green - right turn/brake
blue - electric trailer brakes
yellow - left turn/brake
red - 12-volt power
brown - running lights
black - ground

I would also recommend testing the functions of your wires with a circuit tester, part # 40376, to verify the function of the wires on your vehicle. Then, wire your factory wires to the 7-Way using the functions of the wire and not the colors. Vehicle manufacturers have intermittently changed wiring colors over the years.

expert reply by: Jeff D