Where is my headlight sensor located

1998 CHEVROLET BLAZER
130,000 MILES
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JEFFREY A
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what are those little bubble looking things sticking up from both the center in the defroster vent and the right side speaker grill?
Dec 17, 2012 at 1:38 PM
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HMAC300
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they arelight sensors for your headlights to go on auto matically when it gets darker out. antoher may be a temp sensor
Dec 17, 2012 at 3:13 PM
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JEFFREY A
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thank-you,very much.
Dec 17, 2012 at 3:16 PM
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