I agree. Always check for flaky connections, especially in the grounding system. We tend to overlook grounding but a bad connection in the trailer ground wiring can cause the vehicle brake controller to not find a trailer that it thought was there earlier.
Hi, I had this problem on my '15 Yukon XL. I found some youtube videos that showed where to cut holes to reach the broken conductors. (I have a link to the one I liked best but I'm new here and don't know if we are allowed to show them.) Then I soldered small wires across the breaks. I used a...
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