Hola !!!, I bought the Proline part 2 speed/washer wiper switch(because Lucas does not manufactured it any longer) to substitute the original one for my series 3 1972 with original wiring system. I try to install in the same order from my old one, using the knob’ lock pin like the guide, but nothing happens, does anyone have that problem before and can help me to use the right wires order or send me photos or diagram?, Gracias for any help !!!!