eujinee: can work wan.. dun worry.. ask the installer to add another wire to the switch. sure can use again.
sorry to pour cold water on u bro, but it a serious fact that we cannot avoid tow trucks.
however, i hope to share my common practise of parking that will reduce the chances of tow trucks "operations".
1) when parking, always park into the bay. not ur front facing outside. below will not work unless this is followed.

2) make sure you turn your wheels at least 1 turn (left or right doesn't matter) and there is a built-in steering lock make sure it clicks. tow trucks can't tow ur car unless ur wheels are straight.
3) engage gear 1 for MT or P for AT transmission. tow trucks can't pull ur car out. they will spoil the transmission.
4) if they decided to break into ur car to disengage the transmission, u still have ur built-in steering lock there.

5) optional to add "movement" sensor inside car cabin so tat ur car will blare its siren when the car is broken via windows.
hope this help a little to fellow LYN CPSers.
Happy CPS-ing and keep safe.
this weekend i'll be in kl shang ri la for my bro's convo. finally graduated. hehe..
Thanks for your guide. Sure will follow it, cuz no money install super security system.
No. 2 is really common sense but I think a lot of people won't think of it. I also used to turn steering nice and straight after parking. Heheh... Won't do it anymore.
J'Daniel: replied to u a few pages back. Please check properly.