2013 Chevrolet Tahoe photocell

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comtech5

Member - Posts: 6

Joined: February 21, 2013

Location: New York, United States

Posted: March 03, 2017 at 4:13 PM / IP Logged

I need to tap into +12v when the vehicles' dash mounted photocell senses nighttime condition. And no voltage for daytime. I can't use the headlight ckt for reasons i won't go into here. Can anyone advise?

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comtech5

Member - Posts: 6

Joined: February 21, 2013

Location: New York, United States

Posted: March 09, 2017 at 10:25 AM / IP Logged

After much research, I'll answer my own question...

BCM connector 2 (white) pin 3 (brown w/white trace) goes high (+6vdc) when photocell on dash senses twilight/nightime condition. If you need +12vdc to trigger your device, just insert a relay with a 6v coil.

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