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Troubleshooting Driver and Passenger Turn Signal On Tekonsha T-One 118668 Not Working  

Question:

Hi, after installing the trailer wiring harness, i see that only the tail light and the brake light is activated but not the turn signals. What could be the reason behind this? Thanks.

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Expert Reply:

I would start with checking the white ground wire that got grounded to your 2014 Volkswagen Touareg, as this is a pretty common issue when a ground does not have a good connection. Make sure the ground is secured to clean corrosion free metal.

Next remove both of the tail lights on your vehicle, and check that the pins inside of the connectors of the # 118668 are not bent or damaged.

If all of those check out, use your circuit tester to check the yellow and green wires coming into the module from the tail lights with the brakes applied or the turn signals on. If you have power before the module, but not after that means there is an internal short and the module will need to be replaced.

I included a video of the # 118668 being installed and a link to a helpful article on wiring for you to take a look at.

expert reply by:
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Samuel C

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