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Trailer test light function not working

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Old Sep 22, 2025 | 09:44 AM
  #1  
Blue2023F350's Avatar
Blue2023F350
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From: Sparks, NV
Trailer test light function not working

New member here with a question.
I have a 2023 6.7. With my previous 5th wheel (2023) I could test the trailer lights using the on screen menus. Now I have a 2026 5th wheel and the function does not work. I get a you must connect type of message. The trailers lights do work but not in the test mode. Any thoughts??
 
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Old Sep 22, 2025 | 10:58 AM
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acdii
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Did you set the trailer up? It wont work until you do.
 
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Old Sep 22, 2025 | 11:58 AM
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Blue2023F350
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I sure thought I set it up correctly but will verify once the trailer is back home. Thanks
 
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