mine does this too! but all the time even when the engine isn't running? its a sort of buzzing sound? me and my dad had a look but we couldn't tell either.
my stickers had faded too but didnt come with the ones on the bonnet paid £25 for my plates at show, must have been ripped off not seen many SRs with a sunroof, wish mine had it and the tte exhaust
have you got ones out of a glanza? i have some in my sr, when i 1st put them in they didnt work right so i changed was like you said the all ignition lights from my sr ones to the glanza ones and then swap the green board on the back of them which made mine work perfect! sportiff might be slightly different though as i dont think it will have the rev counter lead? hope this helps
INTERIOR UPDATE! right so got bored of looking for glanza rear bumpers that clearly dont exist! so started looking for some recaro seats and found some out of a toyota surf that look similar to the factory option ones for the starlets just need to get the runners sorted out, hopefully next week! couldnt help but sit one in place for a look cheers