Headlight Sensor?

Tiny
ERIC PETERSEN
  • MEMBER
  • 2006 CHRYSLER PT CRUISER
  • 60,000 MILES
Above the rear-view mirror and adhered to the inside of the windshield is a sensor who's purpose I cannot identify. Behind it, a dotted pattern has been applied to that area of the windshield as if to shield the sensor from daylight.

A while ago, the sensor fell off it's adhesive mount and was dangling, so I tucked it in above my sun visor. The next morning I went into the garage and noticed that the parking lights were flashing at a very slow rate. I finally located that sensor as the source of the problem. When I pressed a button on top of it, a small blue LED light came out of the sensor and then the flashing stopped.

I have since re-mounted the sensor in it's proper place, but as an old car guy, I'm just curious about just what the heck that sensor is for.

I'm including a couple of pics.
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Thursday, September 26th, 2013 AT 8:37 AM

3 Replies

Tiny
HMAC300
  • EXPERT
It's a light sensor
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Thursday, September 26th, 2013 AT 9:37 AM
Tiny
ERIC PETERSEN
  • MEMBER
But what does it control?

Eric Petersen
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Thursday, September 26th, 2013 AT 12:41 PM
Tiny
HMAC300
  • EXPERT
If your headlights and or running lights come on likein a heavy rainstorm or whenit gets dark they turn on lights.
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Thursday, September 26th, 2013 AT 1:30 PM

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