While swapping the map lights to LEDs today I managed to grab the old bulb with a pair of long nose pliers and on its way out the wire tail must have bridged the terminals and the switch must have been in the on position (didn't know because the bulb was dead). The interior lights dimmed for a split second and came back. It was the last bulb to change and now I can't get any of the map lights on, the boot light and tiny LED mood light things are also off and the suspension is throwing the code in the screenshot attached, clear it and it comes straight back.

Click image to enlarge

F g things working. Just been out in it and as I turned the key, the offending map light came on and no suspension faults came up. BCM must have had a brain fart and reset itself while it was left. Current
2017 Range Rover Sport SVR
2001 Porsche 911 Turbo
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2013 Range Rover Autobiography SDV8
2007 Range Rover Vogue SE TDV8
2002 Range Rover HSE TD6
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had this when I did the boot leds, seamed the car didn't want to do anything, I did a battery reset, and hay presto the bloomin thing worked ok.
glad your sorted, the ff is fine sometimes if you just leave it.