Thread: o2 sensor wiring help
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Old Aug 12, 2003 | 05:38 PM
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PHiZ
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From: NL CT
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http://216.239.53.104/search?q=cache:TXyLHWPUxpMJ:http://www.diy-efi.org/gmecm/ecm_inf...hl=en&ie=UTF-8

A common color coding for heated 02's is:

White pair - heater (12 volts)
Black - signal to ECM
Grey - signal ground (on a 4 wire unit)

-PHiZ
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