Troubleshooting No Turn or Stop Lights on Trailer with Tekonsha T-One Wiring Kit

Question:

I bought the T one connector the running lights work no brakes or turns

asked by: Dan G

Expert Reply:

The first thing to do is determine if the problem is on your vehicle or trailer side. Use a circuit tester like part # PTW2993 to test the 4-Way Flat T-One # 118670 that fits the 2017 Nissan Pathfinder you selected as your vehicle info. I have attached a photo showing what pins are for which functions.

Since the wiring is new I would imagine that the problem is on your trailer. When you will need to do is make sure that your trailer plug is clean and free of debris and corrosion. If this is the case then you need to check the grounds for your left turn/stop and right turn/stop circuits as well as the wiring for these as well. Be sure the grounds are connected to a clean, bare-metal surface and that your wiring doesn't have any brakes or is exposed anywhere.

If this doesn't fix your problem let me know and I can help you to troubleshoot further.

expert reply by: Jon G