Help with Morrette electrical adjustment schematic
 

MY52 WRX
Da#n, da#n, and da#n again. MOT coming up and on checking my car found that the nearside morrette headlamp unit is not adjusting when the level adjust is changed in the car. Might pass I guess, but I'd like to sort out the problem anyway. I've searched my "ebay" workshop manual, but no reference to any electrical adjustment wiring. Could anyone be very helpful and point me in the right direction. If you have the correct wiring diagram from the levelling switch to the headlamp units I'd be really grateful:(