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2000 Gs400 Alarm Not Working (locking Works)

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I recently got a 2000 GS 400. The master key with the remote button on the car locks and unlocks the vehicle fine (with the flashing light and beeping chirp), and the car drives fine, all the stuff that you would test out during a test drive. The other day, I was curious as to whether the siren sounds like a horn or other noise.

So I rolled down the driver side window and locked the car with the remote key. The LED stayed solid red, and after waiting a minute, I opened the door by REACHING INSIDE and PHYSICALLY unlock the lever, and opening the door. The alarm DID NOT GO OFF?!??!?!

Is it busted or am I just not performing the right test?

Please advise!


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