Trailer lights

[Viper67]

When I hooked up my trailer the brake lights and the blinker lights worked on the trailer. But when I turned on my truck lights I don’t think the trailer lights came on. I’m going to test it all later tonight. But has anyone had trailer light issues? 2019 1500 Laramie.


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[1stRamowner]

I have the same issue, the fuses are good but no power on the running light wire in the 4 pin or the 7 pin connector, Did you figure this out? Thanks

 

[Jus Cruisin]

When I hooked up my trailer the brake lights and the blinker lights worked on the trailer. But when I turned on my truck lights I don’t think the trailer lights came on. I’m going to test it all later tonight. But has anyone had trailer light issues? 2019 1500 Laramie.


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I've had to move wires on older 7 pin trailer plugs to match up with the truck wiring. If they are correct, then I'd get power to the trailer running lights and check that next.

 

[jlfkb2]

I'm having the same problem on my 2019 1500 Big Horn. Fuses are all good. The trailer works as should on my F-150 4-pin, but only getting one brake light/turn signal on the RAM, and no running lights, rear or side markers. I saw one guy had to have Dodge find a short in the harness of the truck, but that's a lot of trouble shooting. Anyone figure out what's going on?

 

[Bt10]

I am wondering if your 7 way plugs only engage the truck plug by about 1/16 of an inch. My GMC engaged about 3/8". ????

 

[jlfkb2]

I have the same issue, the fuses are good but no power on the running light wire in the 4 pin or the 7 pin connector, Did you figure this out? Thanks

Know it's an older thread, but did you identify the issue?

 

[Sam_The_RAM_Man]

When I hooked up my trailer the brake lights and the blinker lights worked on the trailer. But when I turned on my truck lights I don’t think the trailer lights came on. I’m going to test it all later tonight. But has anyone had trailer light issues? 2019 1500 Laramie.


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Are you using your Tow/Haul Mode on the RAM?

Have you checked your fuses?

Worst case scenario, you may have a broken wire on the wiring harness going back to the trailer plug. If you’re under 3 years of ownership or 36,000 miles, it will be covered under your warranty if this is the case.

 

[cj7]

My trailers’ running lights only come on when the truck headlights are on. Brakes and turn signals work as expected.

My trailers’ rear view cameras work off the running lights. Initially I had to drive with the headlights on all the time. Got tired of the dash being too dim during the day, so nstalled a waterproof switch on the trailers that powers the running lights from the +12v lead.

 

[Trooper4]

My trailers’ running lights only come on when the truck headlights are on. Brakes and turn signals work as expected.

My trailers’ rear view cameras work off the running lights. Initially I had to drive with the headlights on all the time. Got tired of the dash being too dim during the day, so nstalled a waterproof switch on the trailers that powers the running lights from the +12v lead.

Trailer running lights are connected to the
RAM parking light circuit, not the daytime light circuit. Headlights or parking lights have to be on for the trailer clearance lights to illuminate.

 

[Fkvt]

When I hooked up my trailer the brake lights and the blinker lights worked on the trailer. But when I turned on my truck lights I don’t think the trailer lights came on. I’m going to test it all later tonight. But has anyone had trailer light issues? 2019 1500 Laramie.


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Did you find a solution yet? My 2019 ram 1500 bighorn is doing the same thing. And I’m really getting tired of this.

 

[Fkvt]

Are you using your Tow/Haul Mode on the RAM?

Have you checked your fuses?

Worst case scenario, you may have a broken wire on the wiring harness going back to the trailer plug. If you’re under 3 years of ownership or 36,000 miles, it will be covered under your warranty if this is the case.

Is there a solution to this problem yet. My 1500 bighorn is doing the same dam thing.

 

[Gitter]

Is there a solution to this problem yet. My 1500 bighorn is doing the same dam thing.

Do your trailer lights turn on when the headlights or parking lights are on?

 

[Fkvt]

Do your trailer lights turn on when the headlights or parking lights are on?

No I only have brake lights and turn signals no running lights on while truck lights are on.

 

[Fkvt]

Is there a solution to this problem yet. My 1500 bighorn is doing the same dam thing.

Yes I am.

 

[Trooper4]

Get a circuit tester and check the receptacle. That will tell you if it is the truck or the trailer.

 

[baccigalup]

Wow. No solutions? Found this issue on my 2021 today....near as i can tell the fuse for the marker lights is optional and not there. I will check with dealer since i have the trailer tow package .