Sounds like an earth problem for pretty much everything!
You might find if you look in a haynes manual then a couple of them may actually rtun off the same earthing signal, so could jut be a loose/broke connection causing the rest to be at fault!
In fairness, none of them are major parts, they are all accessories, so each part can easily be replaced with simple scrap yard hunting, if it isnt an earthing/wiring fault.
Q
