2004 Toyota Sienna, All Doors Open Wiring?

I am installing the alarm for the Sienna 2004 van. Do any one know which wires are for all doors open/ajar on the underneath front driver side.   I know that when any doors open there is light on the dashboard show light with lcon of any doors open. Where is this wire located? I am not wanting to connect to all 5 doors on this van for detecting door opening to trigger the alarm. Any idea to do this all doors trigger wiring?mrteausa

Check the blue wire at the interior light switch.

Is the interior light switch has on/off for the all inside lights. What is the blue wire do? Negative trigger or Positive trigger? DO I need to put diode on it? I check it but only works with light switch on when off it does not work..mrteausa

This is the switch on the dash. I see it listed as negative trigger. A diode shouldn't be necessary: https://jdmfsm.info/Auto/--General--/Autoelectric%20schemas/Alarm%20cables/index2be3.html?MakeID=2&ModelID=18040 Since the white/black ground wire is only used in the on position, we can deduce the blue wire is a negative door trigger.

I just have time to test this blue wire today. The only blue wire I can find is Blue with couple red stripe on it.   When I test this wire with Continuity test meter, with I probe on this wire and another probe to ground wire, it test beep continuity on all door closed and any door open. So I don't think this is the correct wire. I also test these same probe using voltmeter when all door closed it does not show 12v power and open 0 volt. Can you tell me how do I test this blue wire to make sure it is the correct wire for all doors open sensor trigger.mrteausa

Even if it's not blue, this wire should be located in pin 5 of the connector at the interior light switch. Touch the positive meter lead to a constant 12 volts and the negative lead to the suspected wire. Your meter should show 0 with the doors closed and 12 volts when open. The diagram shows this wire has continuity with the ignition key cylinder light so you might check there, too. If you locate this wire test if it shows ground with the back door open. If not you may need to diode isolate and connect to pin 6 as well.

Sorry, not luck. I try as you said use test pen with one lead connect to 12v battery and another lead connect to any wires on the Dome Switch Lights plug. I open and closed the rear doors, the test light pen does not change status.   But I do see the dash board of the Door ajar indicator light up when any doors are open. Why none of the wires on the DOME light plug show that? Is this a digital signal or I did not do it correctly. Anyone have issue when install alarm on a minivan on how to get the status any doors open? It would be nice if I can tap to the light door open on the dashboard. Any diagram on where this wire are located under the dash?mrteausa

If all else fails, just run wires for each door and diode isolate.

I know I can do that but it is too long to route each wires to the door switch and it has 5 doors. Should be a easier way. Anyone that wiring the alarm system on the Van how do they connect to the all doors trigger? Then there is no challenge. I like challenges.mrteausa

If there's not a wire at the switch as listed in the factory manual your best options are to either connect to all door triggers and diode isolate or use a data interface to provide this. There is not a separate wire at the cluster as this is handled by data. You can get all door triggers at the BCM: https://www.the12volt.com/installbay/forum_posts.asp?tid=85454