Ram 2012 tail lights

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oldUncle00

Junior Member
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Apr 8, 2025
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2
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Location
Colorado
Ram Year
2012
Engine
5.7
Hello I installed led taillights on my ram 2012 they come on the 2013+ models I purchased a harness specifically designed for the purpose of using those on my 2012 my friend with a 2011 got the same harness and got his new led tail lights running however mine only work when I brake and use my signals the running lights don’t work. All my fuses have been checked Here’s the harness I am using https://retroshop.us/collections/4th-gen-ram/products/13-tail-light-adapter-v2-0.
 

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SitKneelBend

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Location
St. Louis
Ram Year
2014
Engine
3.6 Pentastar
Hello I installed led taillights on my ram 2012 they come on the 2013+ models I purchased a harness specifically designed for the purpose of using those on my 2012 my friend with a 2011 got the same harness and got his new led tail lights running however mine only work when I brake and use my signals the running lights don’t work. All my fuses have been checked Here’s the harness I am using https://retroshop.us/collections/4th-gen-ram/products/13-tail-light-adapter-v2-0.
You should contact Jeremy at Retroshop. He can get you squared away.
 

Phillirdwn

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Oct 20, 2023
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Location
Florida, USA
Ram Year
2012
Using ram LED tail lights on my 2012 too, and they’re a bit finicky. I had success adding a small resistor to the running light circuit — seems the BCM wasn’t seeing the correct load and wasn’t sending full voltage. Cheap fix and worth trying before replacing the harness.
 
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