I cannot think of anything else, as I have tried 2 different trailers and the same thing happened with both - so I can disclose the trailer electical failure related issue. Seems like a factory hitch.

thx for the advice anyways....

I wonder if anyone else had this same thing.

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X5 3.0d - Space Grey , Beige Leather, Burl Walnut Trim, SatNav, Rear Camera, Sunroof, Light Package, 19" 212 Wheels, Tint, Power Fold-in Mirrors. AUDIO: Morel Elate 6 Audiophile Speaker System with Genesis Dual Mono Amp and Rockford Fosgate 3Sixty.2 DSP