Weird Electrical Effect

[Toms306]

I 'think' there's an earth for the interior light on the roof above the console but it's been a while since I removed one now. There is one either side near where the door loom enters the car but that seems a fair way from the light tbh. 306 battery terminals are terrible so maybe worth checking those or even uprating them. The neg ones often don't tighten properly onto small terminal posts.

Also I'm pretty sure all lights dim if you clutch it from high rpm, the regulator can't smooth it that perfectly!