Does anyone know where to find/locate the alarm set signal on a gen3 2015 prius? Second choice would be the door lock signal. I have installed the factory alarm and the relays for the DEI Hub1 tilt sensor. For the later I currently use the switched/ignition +12V & the driver door, signals. The drawback is the tilt sensor can go off when the Prius is off/not ready with the door not locked and thus the alarm not on. That makes the dome lights flicker/go on. I could probably run a wire way up to the hood release line instead of the door signal. However, that would still allow excess use of the tilt sensor and I'm still not sure as wired that it won't burn out the (-) trigger out signal of the tilt sensor. It's working now but I have not zip tied everything up and re-installed the cabin covers. The attached photo uses the "other" DEI tilt sensor wire colors.
I did some probing around on the hood latch wires. My latch doesn't have wires to it, so a jumper is in place to connect the two wires. One wire is ground and the other is at 2.2V when the car is off and 6V when the car is on. With the jumper in place, both wires are obviously at ground. The door switch line when the car is off (& probably the same when it's off) is 12V when the door is closed and zero volts when the door is open. I took a pin and poked through the hood jumper wire. I then removed the pin and connected it to 12V. I tried to momentarily connect it through the poked hole while the OEM alarm was set. That did set off the alarm but fried the pin up to the test lead in that instant. Obviously, the hood switch works on opposite voltages as the door. It doesn't appear that using the hood signals is too viable at this point. Thoughts?
