I am no sparky but this doesn’t make sense

Evening all

Roughly 2 years ago my front passenger side window switch stopped working. Not a big deal I can open and close from the driver side. So yesterday I thought it’s time to get it fixed for once. I pulled out the left hand side switch and went down to Mr Nissan and got a new switch $34 not to bad I thought and I was happy with an easy fix. Straight after work tonight I was very excited and raced home to install the new switch but my plan went down the drain very quickly.

Couple of things:
Up or down from driver side doesn’t work for that window now. Only down works on the new switch, which opened up a whole can of worms because I some how had to get the window back up. Pull door trim off and started scratching my head looking at all the wires. Finally worked out the 5 wires going into the switch, what they do and where they come from…still nothing. I traced the wires going to the window motor and there was only 2 going in there. Put a positive and negative wire onto the motor and whola down she goes, reversed them and whola up she went…..scratching head very hard at this point. Used the multi meter to check volts at the switch and that was reading fine. Then I discovered there was an earthing problem as soon as I used another home made wire from the body of the car to one of the up/down wires on the switch while flicking the switch the window worked.

I am out of ideas. I really don’t want to give Mr Nissan my money.