Weird collection of electrical issues

[Polyal]

OK so some may have noticed the switch thread I had going, good news is that I managed to find some NOS switches and one repro, all are in..but my windows are still not working.

So I checked my window fuse relay, shook it, no rattle, so I am assuming its oik but I might swap that out aswell just to be sure.

But in the last week the following has also happened, or I have only just noticed;

1. Wiper Water Motor not responding when I pull back the lever..not even trying, no whirr noise.

2. Both electric side mirrors not functioning

3. With the wipers again, when using the stalk to engage the speed the following happens

3a - manually engage wiper by going up, works
3b - bring stalk down one increment, NOTHING
3c - bring stalk down two and to the last increment, it works

4. Could be unrelated, but I have noticed my temp gauge on the climate control is reading consistently higher than ambient

Now all of this "could" be related to a recent headunit install. I did it myself and it was working for a week, then it stopped. I looked at the stereo fuses (Ford fuse box) and it had blown. Changed it to a higher amp..blown, went higher again, blown.

So I took it to autobarn because I was getting frustrated, I have done a headunit a couple of times before so I was 99.9% sure the wiring was correct. Although for some silly reason autobarn couldnt get the ariel to work with the tuner, even I got that working. I didnt have time to argue with them at the time, and I dont really listen to the radio so I let it slide.

Any ideas? Is it maybe a control module? It is now driving me crazy and the last resort is an auto-elec but if its a simple module/fuse/something swap out then I want to try first.

Its very frustrating because everything was fine not long ago.

Cheers