Troubleshooting a 2020 Jetta R-Line With No Working Driver Side Signals

Question

Question:

I installed Tekonsha 118791 on my 2020 Jetta R Line. The right turn signal is powering both left and right at the plug. The left turn drivers side gets no power at the plug at all. The running lights are at 12v but I haven’t tested the brakes yet. My legs aren’t long enough. Any suggestions?

asked by: Monty C

0

Expert Reply:

Monty, the first thing I'd do is make sure everything is plugged in properly and the connectors aren't damaged in any way. The next thing, and honestly the last thing you can check is the fuses.

Since the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118791 just plugs into your factory wiring and does not require any splicing there shouldn't have been any issue with the wiring itself, so it leads me to believe the fuse might be blown on the power wire.

It also wouldn't hurt to check your ground and make sure that's not loose and attached to a clean bare metal surface. If that all comes back fine, then you might just have a faulty harness and would just need to replace it.

expert reply by: Bryce D

0

Monty

3/28/2024

I went through all the wiring last night and used the vehicle ground. I have a good ground and I’m getting power to the box.

Reply

Bryce D.

3/28/2024

@Monty That's strange, so then that leads me to believe that the harness itself might just be faulty. If the wiring is good and you're getting power there should be no reason it does not work.

Reply

Answer 1

What you are describing is normally the result one 1 of 3 issues: First, there could be some corrosion in or on the connectors on the vehicle or trailer side or both. Second there could be a bad ground. Bad grounds can cause all sorts of bizarre…

view full answer...

Answer 2

Ideally, you'll want some of the hardware attaching the e-track to the trailer floor to also secure to the cross members as well as to the planks that make up the trailer floor. If that's not possible, I'd recommend using a…

view full answer...

Answer 3

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 4

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…

view full answer...

Answer 5

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…

view full answer...

Answer 6

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

view full answer...

Answer 7

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

view full answer...

Answer 8

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

view full answer...

Answer 9

Yep, so long as your 2024 Subaru Crosstrek Wilderness is not a hybrid both the Curt and etrailer hitches will fit: - Curt Trailer Hitch Receiver #C13382 - etrailer Trailer Hitch Receiver #e98912 The only difference besides price is the finish; the…

view full answer...

Answer 10

Class I and Class II hitches both have a 1-1/4 inch receiver opening. The difference is that a Class I hitch has a lower tongue weight rating, usually 200 pounds and a lower towing rating, usually 2,000 pounds. A Class II hitch usually has a tongue…

view full answer...

Answer 11

Yes the Curt hitch part #C12130 is a confirmed fit for your 2008 Mercury Marquis. Then for trailer wiring the Curt harness part #C59236 would be a great option. It's a universal style harness that will require hardwiring to the taillight wiring.

view full answer...

Answer 12

Normally trailer coupler height is around 17 inches, from the ground to the bottom of the coupler, and most hitch manufacturers design their hitches to work with a ball mount that will end up very close to this measurement. I am including a link to…

view full answer...

Troubleshooting a 2020 Jetta R-Line With No Working Driver Side Signals

Product Page this Question was Asked From

Featured Help Information

Instructions

Continue Researching