Tail lights not working...

OK, I got some winjet tail lights for christmas, I installed everything, and I thought everything was fine, until I noticed that my tail lights aren't working.

I checked the 7.5 amp tail fuse under the dash, and the fuse tested good, I checked the 30 amp STOP fuse under the hood and that tested good as well.

I put my OEM tail lights back in, and they still aren't working.

I've seen a handful of threads with the same problem, but none of those threads had a solution.

Please help!!!

 

Do you have power to the tail lights? At the actual tail light, not just the fuse.

Have you checked your grounds?

 

I'll be checking that in a few minutes

 

I dont seem to have power going to the tail light sockets, I also noticed that my license plate lights are not working, and my tpms is not registering an pressure. I'm not getting a low pressure light, but when I go to the tire pressure window on the dash all it shows is dotted lines where the numbers should be.

 

Did you put a test light/ probe the fuse itself? Also is your light switch on Auto vs On. I’d try starting the truck to see if there’s some type of relay that shuts power off to that circuit. If not stock lights back in and go to the dealer and play dumb. I hate saying that because it’s really your fault not theirs but maybe it’s something quick and easy that’s being overlooked.

 

OK, big mystery solved, I was checking and replacing the wrong 7.5 amp fuse, maybe somebody else can use this info...

 

I'm having some issues with mine.

The DRL and brake light wont work but they do turn on with the headlights.

Any ideas?

 

What year is your truck?

 

2021 Sport

 

Have you added any accessories to the truck?

Are the brake lights or tail lights not working?

 

Truck is almost stock, just some morimoto fog lights and an adapter for a dash cam to the rear view mirror.

Tail lights work when headlights turn on, but the DRL for tail lights aren't working and even worse the brake lights aren't working. Turn signals work lol

 

Did this just happen? Did the lights work after you installed the Fogs and Camera?

I’m not too familiar with the 3rd Gen trucks.
But I didn’t know there were DTR Lights in the rear?

The only lights that I know of for the rear are Parking and Tail.
Which I don’t think come on with the DTRL.

As for the brake lights, have you checked the 10A Stop fuse?

 

Replaced the 10A with a 20A fuse

 

The truck itself, uses the SC/ECU to ground the relay for the brake lights.

Here’s how the system on the truck works.
10A Stop -> Stop Light Switch -> Stop Relay -> Lights
7.5A IG No.1 -> Stop relay (control power for relay)
SC/ECU -Grounds Stop Relay

Since it’s a 21’ can you just take it to the dealer?
It should be covered under warranty?