I've had my secondhand 2001(ish) Picasso for a couple of years.
A year or so ago I experiened a problem where teh electrics all stopped working on start-up. No wipers, indicators, windows, radio etc - only the headlighst worked.
Pressing the internal light buttons a few times usually made the electrics all come back on.
This problem went away after a few weeks and only reappeared a week or so ago.
Now, though, pressing the lights does not work at all.
I read somewhere that this could be a computer fault and that there was a remedy involving pressing the button on the key fob (my key has been missing its button since I bought it).
FYI, I know as much about the inner workings of a car as I do about the inner workings of a fridge, iPhone or space shuttle, so be gentle