4 Way To 7 Way Plug

4 Way To 7 Way Plug. The plug I bought had yellow as the center aux color. The adapter connects tail lights, brake lights, turn signals and reverse lights.

7 Way Round to 4 Pin Flat Trailer Light Adapter Plug ... (Carolyn Rogers)

The plug I bought had yellow as the center aux color. Same for my blue brake power wire. Pre-wired adapters allow the consumer to create a custom Plug-In Simple wiring system appropriate for any towing situation.

Or do I need to get an adapter ?

Pre-wired adapters allow the consumer to create a custom Plug-In Simple wiring system appropriate for any towing situation.

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If it does not light up, there is no voltage, and it is safe to proceed. I have a factory trailer wiring. The adapter connects tail lights, brake lights, turn signals and reverse lights.