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Old 05-08-2014, 10:26 AM
Elektri Elektri is offline
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Join Date: Jun 2013
Location: PNW
Posts: 242
Just one of those wires goes to the alarm - I think brown?

And yes it should be connected to the metal case [ground] of the new radio if you want that protected by the alarm - activates with loss of the ground connection.

You can test this by rolling down a window, locking the car, then reaching in through the window to disconnect (unground) that wire. The alarm arms when the doors are locked.
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