2. Check blocking.
A) Check what's in position "NORMAL" (unlocked) there is conduction between any of the pins 1, 5, 6, 8, 2, 7, 9, 10, 11, 12.
b) Check what's in position "LOCK" (blocked) there is conductivity between any of the terminals 1, 5, 6, 8, 2, 7, 9, 10, 11, 12.
3. Checking the backlight. Connect (+) batteries to output "13" or "14", (-) to the conclusion "5" or "6", check that:
- - when the windows are locked, the backlight of the driver's door window switch works;
- - when the power windows are unlocked, the illumination of the power window switches of all doors works.