No 12V Power at 7-Way Trailer Connector on 2013 Ram 2500

Updated 05/05/2025 | Published 05/03/2019

Question:

When plugging my electric trailer jack into truck Im not getting power but my trailer lights and brake lights are working. Any idea where the 12 volt power for trailer plug is? 2013 ram 2500 Cummins. Thanks

asked by: Arlie C

Expert Reply:

If you aren't getting any power at the 12V pin on your Ram's 7-Way then a blown fuse under the hood is indeed the most likely culprit. I took a look at the online version of the owner's manual for your 2013 Ram 2500 and it appears there should be a 40 amp green fuse at the J01 location inside the power module (near the battery under the hood) for this circuit. Make sure this fuse is present and in good condition and replace if needed.

If this doesn't resolve the issue please let me know.

expert reply by: Chris R

Wade

5/3/2025

I have a 2013 6.7 Cummins, that has lost power to the 7 way auxiliary plug for the camper. I changed the forty fuse that was burnt, but still no power back there. Any help wld be greatly appreciated! Thx

Chris R.

5/5/2025

@Wade Hey Wade, if replacing that fuse didn't power up the 12V circuit, then there might be something a bit more complicated going on with the factory wiring. Honestly your best option would probably be to just bypass that factory circuit and make your own. You can use some 10 gauge wiring # 10-1-1 and a circuit breaker # 9510, running a length of that wire from the 1:00 pin of the 7-Way up to the positive post of the Ram's battery through the breaker.

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