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My Utility Trailer lights don't work with my new 2022 Ram but work with my old Ford van? HELP??

398 Views 6 Replies 3 Participants Last post by  soundman5000
I have a 10-12 year old ( From Home Depot ) utility trailer and the lights will not work with my new 2022 3500 Limited.
The trailer uses the flat 4 pin connector and my new truck has the trailer package so I have all the connectors but I have no lights when my trailer is connected to my new truck.

I connect the trailer to my old 2002 Ford work van and lights work perfect.

I purchased one of those plug in led trailer light testers and when I plug it into my new truck those test led's show my truck light connector is doing as designed but when I connect my trailer I again have no lights.

The trailer has older in incandescent trailer lights and I thought about changing them out to new LED but can someone even suggest a place I could start to figure this out? I can't understand why my lights work with my van but not my new truck and the tester shows everything is working when I plug the tester into my new trucks connector and my vans for that matter...

Do I have a hidden on and off in the menu? I found the backup alarm on and off in the menu ?
Can anyone suggest what wrong?
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Thanks folks! I was stuck not knowing what to do next...
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Or just grind the paint off the receiver and the hitch 😂

In all seriousness though i would add a new ground that goes to all the lights like mentioned and swap the 4 pin for a 7 pin (last part is optional but i just hate 4 and 5 pin connectors lol)
I think I may just rewire my old trailer with newer LED lights. Kits are dirt cheap and I have a broken plastic lens anyway. Im not well versed in all things towing and never owned a RV and not even clear about the different ends ( plugs ) , All I know is my new RAM has a few plugs so I'll try and figure out some options this weekend.
The reason I purchased a 3500 is I intend to do some car hauling so I will be learning more about towing / trailers soon as Im shopping for a car trailer now. But, as of now l I have only used 4 pin connectors and no I don't like them either...
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