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2006 Chevrolet Trailblazer, Alarm Disarm Wire

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Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
Printed Date: November 30, 2022 at 11:26 AM

Topic: 2006 Chevrolet Trailblazer, Alarm Disarm Wire

Posted By: santon
Subject: 2006 Chevrolet Trailblazer, Alarm Disarm Wire
Date Posted: June 24, 2022 at 9:53 AM

When the driver's door is unlocked, the lt green alarm disarm wire (or keyswitch signal) is at ground potential. The contact pair inside the cylinder switch simply connects it to the ground. However, what potential is present at this wire when the door is locked? 12V, 5V, or is this wire just left floated?


Posted By: catback
Date Posted: June 24, 2022 at 8:29 PM
That's a very specific question to which I'd say grab a multi-meter and measure it. From an alarm installer perspective, it doesn't matter what the voltage is when it's not grounded - the ground path is all we care about, whether we ground it with an installed aftermarket device or detect it being grounded during normal OEM function (door being unlocked with key).

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