Since you had the error on your 2021 Ram 1500 and another truck it is probably safe to say the issue is on your trailer. Based on the information you have provided, I would start by double checking your ground connections. Make sure they are secure on a clean, bare-metal surface.
If that does not solve the issue, I would check the brake output wire. More than likely you have a short in the wiring or a loose wire and that is what causes the error when you turn. If you need to replace the... view full answer...
It sounds like you have one of two possible issues with the Lippert Power Stance Electric Trailer Jack # LC89VR.
First there is a fuse on the power wire that is not present on the Auxiliary Power Cord # LC79VR. Be sure to check the fuse.
The second issue to check is your ground connection. Since your trailer frame is painted as well as the jack the mounting brackets do not always make the best contact. The jack uses the frame as the ground circuit so you may need to grind off some of... view full answer...
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