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Location of Factory Connector for Trailer Wiring on 2006 Chevy Silverado 1500  

Updated 05/28/2025 | Published 12/17/2009

Question:

I am having problems wiring a four way flat trialer connector to my truck. The turn signal & brake are the same bulb. 118384 does NOT plug into my truck. My truck is a plain 1500 work truck with no trialer provisions at all. Every harness plugs into a gray square plate under the truck on the drivers side.

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Expert Reply:

Your truck should have a round connector located above the spare tire for the adapter (part # 118384) to plug into.
To locate the connector, you might have to lower the spare tire. The connector is usually zip tied to the rearmost cross member. The connector might have a protective cover over the end of it to keep road debris out of it.
Certain models might not have the plug, but the wiring harness should still be there. If this is the case with your vehicle, cut the plug off the end of the 118384 and connect the wires to the existing harness found above the spare tire. Connect the yellow wire on the 118384 to the yellow wire on the harness. Do the same with the brown and green wire. Ground the white wire found above the spare tire to the truck frame, along with the white wire from the 4-way.

You can view some additional information at the links provided.

expert reply by:
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Mike L
Chris profile picture

Chris

5/25/2025

Great information Mike. My truck had the connector tied to the rear crossmember like you mentioned. If I want to use this connector, what are my mounting options? Do I have to drill holes or is there existing screw or bolt holes?

Mike L. profile picture
Etrailer Expert

Mike L.

5/28/2025

@Chris There aren't existing holes. Most folks use a bracket system like the # 18140 no-drill bracket along with the # 18144 bracket. The 18144 is compatible with the 4 pole connector used on the # 118384. The 18140 uses a pipe clamp to attach to the hitch crossbar. You do not want to mount it by drilling into the hitch. I hope that helps you!

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