What is this for?

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More info? It may be alarm related. What alarm do you have installed?

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Could be the Valet button. Described briefly here:
http://auto.howstuffworks.com/car-alarm1.htm

Quote:

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Originally Posted by DLO01

Could be the Valet button. Described briefly here:
http://auto.howstuffworks.com/car-alarm1.htm

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Agree, and if that really is the Valet button, you should try to HIDE it from the theft's view lol

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definately alarm related. its either valet activation or emergency deactivation. dont worry you wont be able to deactivate the alarm if you dont use the key at the same time. my guess its an old black widow alarm system.

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momentary switch. works when you put pressure on it, bit like parents to GEN-Y :D

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valet switch ，hahaha...

http://i108.photobucket.com/albums/n...mOz/closed.jpg