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What color is the ground wire on the downstream O2 sensor?

(2002 Toyota Camry)
in Pikeville, KY on November 22, 2012
I have 2 white which should be heater wires. 1 grey and 1 black
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Popular Answer
of Joels Auto Service on November 22, 2012
check out www.bbbind.com for wiring schematics on your vehicle.
on November 22, 2012
black is universal ground
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