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Running Lights Not Working on Trailer Being Towed by a 2016 Dodge Grand Caravan  

Updated 10/21/2025 | Published 07/05/2018

Question:

I plugged our trailor into my 2016 caravan. Running lights dont work. Signal and break lights work. Running lights were working befor so I assume it is a fuse. I cant locate where the fuse for that is in my fuse box under hood. Not sure 8f you cannhelp but I thought I would ask.

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Expert Reply:

The only fuses that look like they might be related to your trailer running lights are M14 (Trailer Tow) and M17 (Left Tail/License/Park Lamp, Running Lamps). These will be located in the fuse box under your hood.

It could also be that you have a short somewhere. Check the connector on your 2016 Dodge Grand Caravan and your trailer as well as the grounds for both. If those are all clean and free of corrosion then your next best bet is to check the wiring itself. Look for places where the wiring is damaged or bent and replace as necessary.

I am linking a helpful article on wiring to this answer page but if you are still having trouble feel free to reach back out to me as well.

expert reply by:
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Jon G
Bob M. profile picture

Bob M.

10/20/2025

Having this same problem n my 2016 Dodge Caravan. I cannot find the link you mentioned. Can you please send it to me? Thanks in advance. Bob.

Jon G. profile picture

Jon G.

10/21/2025

@BobM It's just further down on this answer page, but I'm linking it to this comment for you as well!
Bob M. profile picture

Bob M.

10/21/2025

Hello Jon, thanks for you quick reply. I have a 2016 Dodge Grand Caravan with i believe a factory tow option 7 pin connector. Checking with my meter on the vehicle plug i have power to my brakes and turn signals only, I do not have power to my running lights and Aux 12v/ charging pins. The vehicle fuse box does have a Trailer Tow fuse in position M14 - there was no fuse (20a) in this spot when i checked?? So I put 1 in and no luck. I quickly looked at the wire harness that leads to the 7 pin connector under the vehicle, it all looks like it was factory wrapped and in good condition. I had a brake controller installed 7 years ago, could it have something to do with this problem? Also, i have never towed this trailer in the dark, so the problem could have been there from day 1. Any suggestions welcome! Thanks Bob.
Jon G. profile picture

Jon G.

10/21/2025

@BobM What does the M17 fuse look like?
See All (5) Replies to Bob M. ∨

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