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Best 4-Pole Trailer Wiring Harness for 2020 Toyota Highlander  

Question:

What trailer wiring harness will I need to tow a small 4x6 trailer (no brakes) with my 2020 Toyota Highlander. I already have a hitch but I need the wiring.

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Expert Reply:

Because of their superior reliability, I'd recommend the # TK99FR T-One Wiring Harness from Tekonsha. As you can see by clicking the provided video and installation instruction links, the install is pretty straightforward.

This is a two piece harness, with one piece being the taillight converter that plugs into the vehicle's tow package harness behind the side panel of the cargo area and the trailer connector itself plugging in under the vehicle. If the trailer connector portion should get damaged in the future, you won't need to replace the whole assembly. The trailer connector portion is available separately as part # TK74FR.

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Mike L

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