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Curt Wiring Harness Short to Ground Turns Off Cruise Control on a 2005 Acura TL

Question:

I have a strange problem with this unit i picked up from you guys even with my trailer disconnected when i use my directional it cancels my cruse control. when I remove the unit the cruse works fine Also all my lights on my trailer and car work fine I checked my GND and are getting 12dc at the unit I am an electrician by trade if that helps any and have wired this unit before with know problems Any Ideas The instruction dont call for me to run a wire back to the battery I have a 2005 Aura TL

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Expert Reply:

It sounds like there is a short or possibly a broken or bent pin in the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # C56231 for your 2005 Acura TL. Check where it connects to the vehicle tail light wiring and see if the pins in the connectors for the wiring harness and vehicle are intact and there is no corrosion.

The wiring harness does not have to be grounded to the battery or powered by the battery. If you are getting voltage on the white ground wire that would indicate a short to ground which would originate inside the converter so the whole harness would have to be replaced.

For a replacement I recommend T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # 118489 because we hear about less issues with the Tekonsha harnesses. I have linked a video showing an example installation for you.

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