Hello,
This sounds like you have a problem with the drivers side door latch which has micro switch in it which have gone bad causing the alarm to act the way it does.
But to be sure here is a security system wiring diagram and a guide to help you do the testing.
https://www.2carpros.com/articles/how-to-check-wiring
Check out the diagrams (below).
Please let us know what you find. We are interested to see what it is.
Cheers, Ken
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Friday, February 9th, 2018 AT 11:13 AM