Power to rear blower and front dash controls

Hello.

I got it this car not long ago. Everything else works apart from four things.
Rear blower, I have put power to it and the blower itself is fine.
Control locking does not work.
The controls to change from feet to windshield do not work.
Rear wiper does not work, the fuse blows as soon as I change the fuse for the wiper.

It has to be power related to the rear blower, central locking and dash controls but I
cannot find anything not connected and the harness looks fine.

I have checked and tested all the relays and fuses and they are all good.
The only fuse that keeps blowing is for the rear wiper.

Tomorrow I will give disconnecting the rear wiper motor and change the fuse again a go.
If the fuse blows again then there is a bigger problem with the rear wiper then just a faulty motor.

For the other three things I would really like to get them working, Any help is appreciated.
Any information such as:
Is the rear blower relay an earth or twelve volt power circuit.
on the central locking: what wire is the always live power line and same for the controls to the dash.
I am happy to add my own relays and fuses and bypass the factory wiring but I need to know what wires are power or earth.

Thank you.