So after installing Dave's LED dimmer relay I had a weird problem. My door locks refused to stay locked. I have the door launchers, with actuators on the launchers and solenoid positions as well as the DMC Digital control module so I had all the lights and beeps telling me something was wrong. Since the dimmer relay requires quite a but of fumbling in the relay compartment, I was positive I disturbed a wire so off I went for the next few hours looking to undo whatever I did. I finally tapped out and decided to sleep on it.
A few days later I found a few hours to mess with it and finally decided to look at the wiring diagram. Maybe it was just coincidence that something messed up. One look and I see it. The inertia switch is part of the door lock circuit? Makes sense to force the doors unlocked in the event of a collision. I would have never guessed.
For freaking YEARS I have used the inertia switch as a theft prevention device. If I am leaving for an extended period I will unhook the battery and trip the switch just as a failsafe. I sometimes will trip the switch just if I am not driving the car for a few weeks but not lock the car. It's in a locked garage after all. In all these years of using the inertia switch I have never triped it and locked the car(with the battery hooked up)...until the other night.
I went out to check and sure enough I had tripped the switch after returning home from the last time I drove it in a parade the previous week (sometimes I just hit it if I know I'm not going to be driving it for some time).
All back to normal now and all could have been avoided by just looking at a tech manual before testing every single wire in the relay compartment.