1999 Mercury Cougar, alarm

just wondering if anyone else has had any experience with these vehicles really. i did an alarm on one of them today and had  a couple of issues with it. first the parking lights have to be Relay Isolated rather than diode isolated from the switch. for this part you have to have 2 relays (kinda like a 5 wire lock system). second, the factory lock and unlock switch stops working if you just tap onto them. i ended up putting diodes of each to retain the button and the alarm. also, does anyone know how to determine whether these vehicles have factory security or not without arming them and letting it sit for 20 to 30 minutes? any response would be great, thanks.

cool, didn't have much problem with the parking lights other than have to sell the customer 2 extra relays but the locks are weird. i pulled a tech sheet from audiovox and a directwire and nothing denoted that the lock and unlock wires required diodes and yes they were neg trigger but here is the weird part. when i went straight from the alarm to the lock and unlock it would disable the factory lock/unlock switch in the door. the only thing i could think was that the alarm was allowing enough of a ground to read back thru the factory switch. as soon as i unplugged the lock/unlock wires out of the alarm everything worked as usual. anyway, never seen that before then and i guess i'll keep that nugget of info in the back of my mind the next one i do.