2006 Corvette Door Pin

I am working on a 2006 corvette. Trying to install a dei stand alone shock sensor, But the door trigger rest on 12volts. And the shock pulses a ground for triggering which is creating the problem. Any help would be appreciated. 

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doug

Of course the door trigger rest on +12v. You want that. You connect the shock sensor output to the door trigger. When the sensor is triggered it sends (-) to the doorpin making the factory alarm think a door opened which makes the alarm go off.

No, check this out... The door pin wires are sitting at 12 v. when opened the pin sends a ground. Simular to a "5 wire reversing polarity" door lock systems. Hmmmm Maby a relay to open the circut and send the ground with out shorting the system.  

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doug

If you have the right wire, even though you're reading 12V, it's not the same as something outputting a solid connection to power, but something being pulled up to 12V through some resistance.
The idea is that if you provide the ground to that line, because it's not a hard 12V, it gets pulled down to ground, causing the dome light and alarm to get triggered.
You don't need to break the connection, only tap in to it.

Someone else could probably tell you if that line you're tapping into is a direct line to the domelight or if it's a control input for a relay, but in the unlikely case it's directly connected to the domelight, don't hook up the shock sensor directly to it. Unlikely the shock sensor could sink that much current for reliable operation; in that case you'd want a relay or other driver circuit for the purpose.