Troubleshooting Trailer Light Fuses on 2012 Ram 3500

Published 01/17/2018

Question:

Hey my turn signals and brake lights work, but my lights arent working from my 2012 Ram 3500 Laramie crew cab! Dont have a manual where would I find fuse for lights under hood or in truck under dash??

asked by: Buck B

Expert Reply:

I was able to find the fuse information for you. You will want to check J01 a 40 amp green cartridge fuse, but most likely it is J14 a 20 amp blue cartridge fuse. This is found in the engine compartment under the hood in front of the battery on your 2012 Ram 3500.

You can use a circuit tester like the Powerbuilt # PTW2993 to test your wiring functions and ensure you are getting power before that fuse as well as after it. If the problem isn't at the fuse, you will need to trace the wire checking it by probing through the insulation every few feet to determine where a short is.

expert reply by: Jason S