I have seen where the drivers side door latch has a micro switch that works with the alarm. I would test the switch and then replace the latch if bad. What happens is when you are going down the road the switch is opening and closing about a million times and the system get confused. Here is a wiring diagram so you can see how the system works.
Let me know if you are not on a phone and cant expand the image I will send larger ones.
Check out the diagrams (below). Please let us know what happens.
Images (Click to enlarge)
Sunday, June 24th, 2018 AT 1:13 PM