It's a Scytek Astra A20 alarm. I've had nothing but excellent luck with this brand, and it's the only alarm brand I've purchased in over 10 years! What I love about Scytek is the endless list of features you can turn on or off or program different ways, plus the fact that they are all made in USA! I used to be a stickler for nothing but Code Alarm brand when they were made in USA, but no so much anymore. Scytek is ALL I'll buy.
So anyway, I appreciate your helpful response!
I just took another look at the wiring diagram in the owners manual for the alarm and it looks like this could be actually pretty simple to remedy! Since it has separate outputs for lock and unlock, I'm thinking all I have to do is put a 1.5k resistor at the end of the unlock wire from the alarm at the white wire! I can actually run BOTH the wires, lock AND unlock, to that white wire from the switch and just put the resistor on the unlock wire. Since it would only get a signal from one of those two wires at a time, it wouldn't be dangerous or stupid. LOL!
I think this is actually easier now than I figured it would be! I just panicked when I was starting to put the alarm in when I decided to start with the lock/unlock wire!
As for your suggestion that it could be easier to wire the lock/unlock at the BCM instead of the switch, I think it probably would actually be easier to go to the switch wire because where it goes through the door jamb, that harness pulls out and it's easy access to the lock/unlock wire. It's a lot closer to get to than running another wire through the firewall. I already have other wires to run to the engine compartment, from both the alarm AND the new stereo going in, so the fewer wires I have to run through the firewall the better.
I'm STILL going to look into one of those DEI modules you mentioned. I can probably find one cheap on eBay!
Thanks again! Your reply was VERY helpful! At 62 years old and after installing alarms and stereos for over 45 years you would think I could figure more of this stuff out on my own, but every once in a while I get stumped.
I'll let you and everyone know how it goes from here out! Now I just have to find a resistor! Not like you can walk into your local Radio Shack and buy one! LOL!