Troubleshooting Curt Trailer Wiring Harness Not Active at All

Question

Question:

How can we activate the circuit so that our wiring harness works? Currently the trailer lights will not work and all the connections seem accurate.

asked by: Hannah

0

Expert Reply:

If you installed the Curt harness part # C76CR on your vehicle and it's acting like it's not active that would most likely indicate that you didn't run the red wire to the battery or even more likely the fuse didn't get installed in the fuse holder. I'd check those two things.

expert reply by: Jameson C

0

Answer 1

Since U-Haul trailers only require the basic trailer light functions you need the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector #C59236 for your 2017 Audi Q7. I prefer the ZCI Circuit Protected Vehicle Wiring Harness #119250KIT…

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Answer 2

The first thing I would do is test for voltage between the tail light connectors and the convertor box to see if the correct voltage is going into the box, but none is coming out on the green wire. This will tell you if the problem is in the box or…

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Answer 3

You've done a great job so far troubleshooting the Curt trailer wiring harness part #56008 that you have on your 2014 Acura RDX. The next thing you should do is test for voltage on the green wire that feeds into the converter box of the kit. If…

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Answer 4

The Curt #C59236 wiring you've found for your 2024 Mazda CX-90 is a universal wiring kit that essentially fits any vehicle on the market since it requires splicing into the OEM wiring of the vehicle for the installation. The Curt 56494, which is…

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Answer 5

The turn signals and brake lights are on the same circuits, but the running lights are on a separate circuit. The brake lights working but not the turn signals are strange since they are on the same circuit. You will need to test the wiring harness…

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Answer 6

In order to narrow this down I would start by checking the vehicle side of the connector. Check and see if there is power using a circuit tester like the #PTW2993. If you find that there is power then you can rule out anything on the vehicle side and…

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Answer 7

Since the Curt 4-way kit part #C24ZV plugs into the factory trailer wiring port it would put the vehicle into trailer mode when towing a trailer like you are wanting it to.

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Answer 8

I have linked an installation video for the Curt Trailer Hitch Receiver #C25FV near the bottom of the page. This is performed on a 2024 Mazda CX-90. I do recommend installing the Curt T-Connector Vehicle Wiring Harness #C24ZV when you install the…

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Answer 9

There are a few troubleshooting steps to help you figure out why you have no power. I would start by making sure that there is not any corrosion or debris blocking your connection points. If they are clean or still no power after cleaning, I would…

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Answer 10

Some trailers will actually end up grounding through the coupler, to the ball of the ball mount, to the hitch, and then to the frame of the tow vehicle. It sounds like that is what you trailer was doing. Did the lights ever flicker when you hit…

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Answer 11

Each lamp needs to be grounded either through its mounting studs being in direct contact with the trailer frame or by having a jumper wire ran from the lamp to the trailer frame. Ground the trailer connector at the front of the trailer, which will…

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Answer 12

If your 2017 Audi Q7 did not come with the factory tow package which if I had to guess would be the case since you are looking for a trailer connector then there are no custom fit trailer wiring harness adapters available. That said, I do still have…

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Troubleshooting Curt Trailer Wiring Harness Not Active at All

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