s13 door eletrical system - alarm install help?

[Fenvy]

well, my friend was helping me installing the alarm, it's a clifford concept 600. I think it has some funny sensors...

anyways, unlike most setup, which has a 1 pulse or 2 pulse system, my friend said that he thinks that s13's door locking system is controlled by sending down a ground signal on 1 wire, by grounding the same wire the doors locks/unlocks.

He wants to know how he can configure the one or two pulse alarm system to work with s13?