Installed Curt Vehicle Trailer Wiring Harness And Not All Trailer Functions Are Working

Question

Question:

Installed harness on VW. I have R blinker and stop but can not get L blinker and running lights to come on the trailer harness side. My car lights are fine though. Any ideas or is this defective part C59236?

asked by: Tim K

0

Expert Reply:

Since you have some working functions, but not all, there is usually a problem with the connections themselves or the wires. I recommend checking the trailer wiring for corrosion within the connection made with your new harness. If there is not noticeable corrosion, I would then check the function of each pin of your new wiring harness with a circuit tester like # PTW2993 making sure the clip end is connected to a clean ground. If the functions work at this point, we have isolated the problem to the trailer.

If you don't have function at the pins, double check your connections in the tail lights and if there still isn't function, you may have a bad converter box. Make sure you have a suitable ground to your vehicle with a metal to metal connection, and make sure you have the black wire run directly to the negative terminal of your battery. To test the converter box you will want to probe the wires going into the converter box from the tail light connection to make sure you have signal there. If you have signal going in, but not coming out, then the converter box is the problem and will need to be replaced.

If everything is working at the new 4-way, then we need to check the trailer wiring for broken or pinched wires. If the wires don't have visual damage, then check the functions with your circuit tester at the lights of your trailer while clipped to a clean trailer ground. If the functions work, I suggest checking your trailer ground connection and cleaning it of rust, corrosion, or debris for a clean metal on metal contact. If the functions don't work, check the bulbs and then run new wire to fix the shorted wire.

I've attached an installation video to help you troubleshoot as well as an article on troubleshooting a 4-way connection.

expert reply by: Jason S

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Answer 1

Although we do not carry the Curt 59146 I can tell you that the red wire connects to the brake light wire on your 2014 Volkswagen Jetta. This is a 3 to 2 wire converter so it will combine the brake and turn signals to be compatible with the trailer…

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Answer 2

The 4-Way Harness #C55379 for your 2003 Toyota Tacoma is going to use the factory wiring to identify when a function is activated and power the trailer connector. Since you mentioned your truck was converted to LED lights if you factory lighting has…

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Answer 3

It's possible that you are drawing too much amperage on the running light circuit of the part #118562 that you installed. The running light circuit can only draw up to 7.5 amps so if you have a lot of running lights/clearance lights on your…

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Answer 4

Yeah, it is definitely a bit to sort through, so I think we can help you out with the right 4-way wiring harness for your 2024 Kia Telluride. We'll start with the easy one, which is if you want to hardwire a 4-way, the model of your Telluride…

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Answer 5

I spoke with my contact at Curt, manufacturer of the #C59236 wiring harness for the 2011 Kia Sorento. He stated that he has not heard of this problem, but there is a test you can perform to help narrow down the problem. You will need a circuit…

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Answer 6

You can expect the installation of the #C59236 in the 2023 Palisade video to be almost identical to your 2022 Hyundai Tucson. I'm not sure if the tail light style varies so removal may be a little different but the rest will be the same.

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Answer 7

It sounds like you have one of two things going wrong on your trailer wiring setup. Either you aren't using the correct circuits when you wired up the Curt Harness part #C59236, or the trailer you are towing has weak grounds and can't handle…

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Answer 8

When installing the #C59236 there is a wire that runs to the vehicle's positive post and there is a wire that needs to be grounded. Failure to do both will result in the harness not working properly. Make sure you have the white wire grounded and…

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Answer 9

Where did you find an install video for the C59236 on a 2010 Volkswagen Tiguan? It's not on our site anywhere, but to answer your question the brown wire is the running light circuit like you mentioned.

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Answer 10

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…

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Answer 11

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 12

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…

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Installed Curt Vehicle Trailer Wiring Harness And Not All Trailer Functions Are Working

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