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Troubleshooting T-One 4-Pole Harness 118438 Installation in 2006 Honda Odyssey


I purchased a T-One # 118438 and installed it on my 2006 Honda Odyssey, but when in connected the trailer, the lights did not work. I reviewed the installation many times and i am sure IO did that part right. Do you have any tips or ideas to help identify the problem? Thank you


Expert Reply:

Tekonsha 4-pole trailer wiring harness # 118438 is a correct fit for your 2006 Honda Odyssey and I am sorry you're having an issue with its operation. For reference, I linked the instructions and an installation video showing this item installed in a 2006 Odyssey like yours.

Since none of your trailer lights function I suspect either a bad ground connection or that the included fuse is bad or is not installed all the way in the receptacle or is in the wrong receptacle. Please refer to the video at the 2:30 mark to see fuse installation.

If there is no issue with the fuse you can double check that the white ground wire ring terminal is either tightly attached to an existing ground point on the car (as in the video) or to a clean bare metal spot that is free of paint, primer, grease, etc. Many issues with trailer wiring can be traced back to a bad ground.

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