This is wiring diagram of Alfa 33 ie 4x4 car that originally comes with 4x4 switch installed and best way
(factory way) would be for us to make exact copy of that or take (from scrap yard) whole rear 4x4 system of
that car, computer, wires and switch, and install it in ours P4. Both N50 units work in same way they disconnect
power to el. Coupling when you brake and engage it moment later. Of course 4x4 N50 units probably has
implemented support for 4x4 while ours have not. ORIGINAL 4x4 SWITCH IS PLACED NEAR FRONT ASH TRAY.
