No tail lights with Auto switch on

[Jimbo001]

I have a 2021 Ram 1500, 12.000 mi. For convenience, I always leave my lights in the "Auto" position. I left my truck running yesterday, with my wife inside with the heat. As I was walking back to the truck I noticed my tail lights weren't on. The truck was still running and the headlights were still on. Turned the light switch to off and back to Auto...still no tail lights. Directionals work, brake lights work, no running tail lights. Turned the switch to the normal "On" position....everything is fine, all lights working. Any ideas why they don't work on "Auto"? Haven't checked them today....in the midst of our first snow blizzard of the season here on the shores of Lake Ontario!

 

[bigdodge]

I have a 2021 Ram 1500, 12.000 mi. For convenience, I always leave my lights in the "Auto" position. I left my truck running yesterday, with my wife inside with the heat. As I was walking back to the truck I noticed my tail lights weren't on. The truck was still running and the headlights were still on. Turned the light switch to off and back to Auto...still no tail lights. Directionals work, brake lights work, no running tail lights. Turned the switch to the normal "On" position....everything is fine, all lights working. Any ideas why they don't work on "Auto"? Haven't checked them today....in the midst of our first snow blizzard of the season here on the shores of Lake Ontario!

was it dark?

 

[Jimbo001]

Daylight

 

[Mr. Grumpy]

What you probably saw was the daylight running lights. The DRL on the RAM DT are the headlights. IIWY, I would check the operation of the Auto feature at night when the photo sensors tell the computer that is dark outside.

 

[bigdodge]

Daylight

then it is working correct
auto is for when you do not want to turn on headlights manually when it gets dark

 

[Jimbo001]

Thanks! I'll try that when it gets dark! In the meantime, now my remote start won't work. Nine months ago I had a similar issue. Come to find out, squirrels had chewed my wiring harness. A $1,200 repair job!! Hope this isn't a repeat!

 

[Jimbo001]

What you probably saw was the daylight running lights. The DRL on the RAM DT are the headlights. IIWY, I would check the operation of the Auto feature at night when the photo sensors tell the computer that is dark outside.

Your right!!! I'm a duh...Everythings fine! Thank you!!