Looking at your photo again (and reading through my own instructions) that isn't the correct plug, sorry. It should have a Black wire with a Grey and Black wire. The plug is a white plastic one on early cars and a black one on post 2014 cars. As I didn't know, I have had a check of what voltage should be on each pin and it is nil on both with the ignition off and 5v on the grey and black pin with ignition on, the black is an earth. Hope that sorts it, back to trying to find the correct plug now. If your car has heated seats the plug may be above the gearbox, visible from below? If no heated seats it is usually near the fuse box...... but it can be anywhere depending on the mood of the person who built your car that day.
