Electric windows info needed

[Steve]

Anyone know if e30 electric windows are positive or negative triggered?

[Brianmoooore]

Eh? Neither. They are controlled directly by double pole, double throw switches wired so as to directly reverse the polarity of the power supplied to the motors with one button compared to the other.
In the static position, both motor wires are earthed. Pushing an up or down button changes one of the two motor wires from earth to 12 volts +.

[Steve]

This is for a windows roll up module from rightclick, I've fitted the keyless entry part which works a treat and now adding the windows roll, but it says to set it up either for a positive or negative trigger.