Solution for Trailer Running Lights Not Working on 2012 Nissan Frontier with Tow Package

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Question:

What port dose the plug go on

asked by: Cole

0

Expert Reply:

Trailer running lights not working with certain Nissan vehicles is a common problem with an easy fix. There is a relay for the trailer running light circuit that is located in the fuse box (in the cab). If that relay is missing or no longer functions then it can be replaced with one of the 2 blue relays in the Curt Relay Kit # C57000.

The relay of the running light circuit on your 2012 Nissan Frontier is in the relay harness behind the passenger floor board kick panel.

If you check out the install video I attached the first thing shown is how to access this area.

expert reply by: Jameson C

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Cole

11/16/2017

What port dose the plug go on

Reply

Jameson C.

11/16/2017

Scroll down to the bottom of this page and check out the install video. In it you'll see the connector you are looking for behind the passenger side kick panel.

Reply

Answer 1

The issue is likely the relay for the running lights. The relay is attached to a wiring harness which is located behind the passenger side kick panel near the passenger door (see picture). You should see a harness with 2 blue relays and a larger…

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Answer 2

What you are experiencing is actually not terribly uncommon on Nissan vehicles like your 2018 Frontier. There is a dedicated relay for the trailer running light circuit that should be located in the fuse box inside the cab. I simply recommend…

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Answer 3

This could certainly be a grounding issue. When a circuit does not have a sufficient ground, it can cause many different issues. If possible, I recommend checking all of the grounds for your trailer taillights. You will want to make sure the ground…

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Answer 4

If your 2012 Nissan Frontier has a 7-way trailer connector then you will need to use both blue relays as well as the brown relay. If you only have a 4-way trailer connector then you would only need to use one blue and one brown relay. If you do not…

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Answer 5

In the passenger side pick panel will be a harness that has a blue relay on it. That is the one that is used for the trailer running light circuit. I attached a picture of where the relay would plug in. If you need a replacement, you can use one of…

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Answer 6

It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side…

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Answer 7

Thanks for all the details of your troubleshooting efforts with the trailer wiring on your 2012 Frontier. Since your old fuses were not blown and your new fuses that have the indicator lights did not light up this tends to suggest that your tow…

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Answer 8

Trailer running lights not working with certain Nissan vehicles is a common problem with an easy fix. There is a relay for the trailer running light circuit that is located in the fuse box (in the cab). If that relay is missing or no longer…

view full answer...

Answer 9

Since all of the other lights are working with your 2012 Nissan Titan then it could possibly be a blown or missing fuse or you will need to add or replace a relay. Use the truck owners manual to find the locations of all fuses and relays related to…

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Answer 10

It's very possible that the trailer running lights relay on your 2013 Nissan Frontier has gone bad and you'd need to replace it with one of the blue relays from the Curt Relay Kit #C57000. Easiest way to test this is to swap the blue relays…

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Answer 11

In order to install a 7-way trailer connector like the 7-Way Molded Trailer Wire Connector part #H20043 on a trailer with five wires, we need to know what those wires do. I can almost guarantee what four of them are; left stop/turn, right stop/turn,…

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Answer 12

If you have an aftermarket wiring kit for your 2017 Nissan Frontier then the relays for your trailer wiring are located to the right side of the passenger's seat next to the door (see attached photo). I have attached a video of us installing the…

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Solution for Trailer Running Lights Not Working on 2012 Nissan Frontier with Tow Package

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