Troubleshooting a Tekonsha T-One Trailer Wiring Harness That Works Intermittently
Updated 12/22/2025 | Published 09/27/2024
Question:
I installed the T-One vehicle wiring in my 2010 Town and Country about 7 years ago. Now, it will work for a while, but then my vehicle starts fast blinking like the light bulb is burned out. If I disconnect the t-connector, the bulb works fine. What could cause this issue?
asked by: Dan S
Helpful Expert Reply:
It sounds like it could either be a grounding issue, or a wiring issue, Dan. I recommend checking the ground connections and make sure they're good and not damaged. If the grounds are good, and the wiring doesn't appear to be broken, then I believe it's time to swap the harness out with a new one # 118552.
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Kate F.
12/22/2025
Hey Dan, did replacing the wiring harness fix the fast-blinking issue on your Town and Country? Knowing how it turned out could really help others troubleshooting the same problem.