The same issue has just happened to me. It's a 2021 defender xmr. I do not have any aftermarket lights or radio. Checked the connections and seems to be good. I've had nothing but bad luck with this machine and not ever hard on the machine. In the past 3 months hanger bearing,main drive line...
This just happened to me. No over head audio or aftermarket lights. Don't even hear the machine switch to 4x4 like used too. It's a 21 defender xmr. Any ideas as I wish to continue to ride els it's going into shop again. This machine has been nothing but a head ache every time we go out it has...