Rite, I posted on here a bit back about my problem, am Goo's mate

I got a mk5 td, its a shitter but this needs sorting

My mum give me it for nowt and the heater switch dint work when she give me it and it wasnt the switch that was broke it was something in the wiring so I just wired the heater direct to the battery and put a switch inbetween, this is not one of my problems

Now for some reason my indicators, wipers and electric windows all stop working at same time from time to time. Sometimes they'll start working, sometimes they wont. Then other day, they werent working and I messed with the proper heater switch just messing about, and it turned my indys wipers and elelctric windows on. If I put the switch on number 1, the wipers wud move really slow, indys wud flash very slow if at all and the windows wud move really slow. Put it on 2 and same happened but faster, number 3 same but faster lol. The heater also worked on the original switch aswell. So I thought sweet this'll do I now know how to get em all working. But no its now not working

What is wrong with the thing? Fusebox?