Troubleshooting Trailer Wiring Harness with Turn Signals Not Working On 2017 VW Tiguan

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Question:

This is in regard to Troubleshooting Trailer Wiring Harness with Turn Signals Not Working On 2017 VW Tiguan Continuing from previous Expert Reply . . . As you can surmise, Im not the installer/electrician. His name is Ken, quite a nice and intelligent guy. Anyway, Ken very kindly let me record this video which explains in his view what is missing from the Tekonsha kit. My understanding is that the fault is NOT the circuit board he also checked for bent pins etc but rather there are two wires missing red and brown. Heres a short video where he explains it. Btw, you guys are an amazing ecommerce company focused on customer service. Its something I teach in my classes. Im a university professor in New Hampshire.

asked by: Howard F

0

Expert Reply:

To confirm it is a controller module (circuit board) issue with harness # 118675, I recommend double checking your connectors to make sure there isn't a bent pin and the connections are tight and then making sure the ground connection is bare metal where connected. Then using a circuit tester like # PTW2992 you can confirm power is getting into the black box from the connections but not exiting it correctly. If it is receiving but not sending correctly then it is a faulty module.

expert reply by: Jason S

0

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Howard

5/22/2020

This is in regard to Troubleshooting Trailer Wiring Harness with Turn Signals Not Working On 2017 VW Tiguan Continuing from previous Expert Reply . . . As you can surmise, Im not the installer/electrician. His name is Ken, quite a nice and intelligent guy. Anyway, Ken very kindly let me record this video which explains in his view what is missing from the Tekonsha kit. My understanding is that the fault is NOT the circuit board he also checked for bent pins etc but rather there are two wires missing red and brown. Heres a short video where he explains it. Btw, you guys are an amazing ecommerce company focused on customer service. Its something I teach in my classes. Im a university professor in New Hampshire.

Jason S.

5/22/2020

Thanks for the video and photo as I see what Ken is missing with the Tekonsha harness. His use of a standard harness as he called it that has a separate brake circuit is not how your vehicle is wired. You have what is called a multiplex circuit which has all the functions available on a the same wire on the left side and the same wire on the right side. The multiplex wiring sends all the stop/turn/running light functions down the same wire on both sides and then the module separates out the running light to a different output for the trailer as is required for the 4-way. I reached out to my tech contact at Tekonsha to confirm this. He said your vehicle is an odd one because some of the Tiguans even within the same year have slightly different wiring and that can cause issue. If you prefer to hardwire those functions like what Ken was talking about then you can alternatively use the # 119190KIT according to my tech contact because it works with multiplex systems.

Answer 1

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Answer 2

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Answer 3

If your right turn signal is blinking with the left turn signal applied that most likely means you have a short between the right turn and left turn signal circuits or you possibly have the left turn signal shorted out to the running light circuit as…

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Answer 4

If a converter box is blown then it will need to be replaced because there are no user serviceable parts inside. To determine if a converter is bad you will want to test the wires going into the box and the wires coming out with a circuit tester like…

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Answer 5

First, I would not immediately dismiss a bad ground simply because there are so many of them in an electrical system that could be faulty. While there may be some fluctuation in the voltage when the turn signal is cycling on and off, it seems like…

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Answer 6

Converter boxes like what is on the Tow Ready Wiring Harness #118349 can short out. Actually if there's a short on the trailer wiring they tend to short out pretty frequently. If you tested the input side of the box and the voltage is there when…

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Answer 7

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Answer 8

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 9

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 10

Hey Jonathon thank you so much for all of that additional information! To haul your bikes behind your class C Sprinter motorhome, while flat towing your Mini, I recommend the Hollywood Racks RV Rider Bike Rack item #HLY64FR and the Roadmaster Dual…

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Answer 11

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 12

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Troubleshooting Trailer Wiring Harness with Turn Signals Not Working On 2017 VW Tiguan

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